It may not be a good idea, but I sometimes get some on my hands without any issue. I find that the number of gallons required to empty the tank is more useful than the ppm or teaspoons rating. Next he said that based on my use of the unit I might want to take off the mixing wand that is inside since the unit can be used with dry fertilizers that need to be mixed. I use it through a small drip irrigation system to my garden and a garden hose for watering my flower pots but only use powder fertilizers. I can't wait for it to arrive. You set it up and it appears to be working for you. I keep them outside in a partly shaded spot but they do get some sun. It must be installed after backflow protection and downstream of any zone valve or hose end water timer. That is why I said I rely solely on the gallons that it takes to empty the tank. *Please note: Maximum water pressure is 50 PSI. He had me stick a thin wire through the cap to verify that it was. Now, I understand based on their website that the unit will taper off toward the end of the cycle. Do you have more than one area that needs to be fertigated? If I did the math correctly it's something like 1.059 grams per gallon of water. I sent a letter to the BBB and I wrote an email to the head of the company in which I linked to this thread. My main complaint is that it is a bit tedious to refill them, which caused me to finally just go to a place like Home Depot, buy garden sprayers, and equip them with fittings to duplicate the functionality of the EZ-FLOW tanks. I bought a Dosmatic MiniDos 1% injector (1:500-1:100) and I love it. Regarding their customer service, I personally found it helpful and honest.
The cheapest I see the minidos 1% is for ~$250. I just got incredibly annoyed with how much it throttled down the output. But it *is* to me and it *should* be to you. Your garden will enjoy fertigation compliments of the EZ-FLO fertilizer injector. You can tell nothing is happening by the fact that 1) the output isn't throttled down 2) the input hose isn't vibrating as it takes up concentrate 3) the level of concentrate in the bucket doesn't fall. I use the 3 gallon model to inject fertilizer every week. I would assume they are probably not a very large company although the website may appear this way. Yeah I'll bet you want us to take your word for it. 
Moon, just wondering where did you get your theory from? I would stay far, far away from this product. If I do mix acid and fertilizer, I'd still have to dilute them with water due to my injection rate. well, that's 750gm per 500 gallons. My alkalinity is quite high, and I have no idea if yours is as well, so I can't make any guesses. Pefectly adequate for dispensing Miracle Grow and the like for containers, flats, in-ground plants, and much faster than a hose end sprayer or a siphon mixer. If you spent $365 on an injector and the bypass setup then for a dollar a day you can water with accurate ppm N in half the time. It was taking me at least 3 or 4 times as long to water my plants. Units can also be connected to a main water line with an installation coupler (sold separately). On most sunny days I need to put out about 100 gallons of water to the pots. They *could* work as advertised if they send you a different part. The EZ-FLO DOES work as described, just not the way the original poster wants to use it. The hose threaded EZ-FLO units include the tank, cap, a hose bib adapter which connects directly to an outdoor faucet with a hose thread backflow preventer (backflow preventer sold separately), the inlet/outlet bypass tubing with barbed on/off valves and a set of flow discs for low flow applications. So you are making a solution of some kind and then injecting that solution? I did use 1234 because pitts was already taken and I noticed moon1234 used numbers to get the base name they wanted. Assuming I have the same ~8+pH as you, (no worries, I will test MY irrigation water) I would add 3.5 cups of dry citric acid to one gallon of water, set the MiniDos to 1:500 and the final output would provide ~5.8pH, correct? @redshirtcat - Thanks for the information on the EZ-Flo. When I start with a new product I test it daily for quite some time before I trust it. I was attempting to use it with acids at first, but when that didn't work I did further testing and found the unit doesn't function as advertised in *any* scenario that I tested. This company is absurd. Today I did a bunch of tests. I only inject acid right now but have considered mixing in fertilizer as well. But they "WON'T.". My answer is, not with liquid concentrate fertilizers and not with any fully soluble dry fertilizer that I've tried (Jack's and MG). Thanks greentiger, I looked at those but decided not to use them because of the available mixing ratios and because they supposedly do not work with longer hose runs (no idea why). Houzz Pro: One simple solution for contractors and design pros, Who knew these tiny dogs could be such a huge fount of design tips? Anyone who will be happy with the fact that this unit will take fertilizer and in some way or another put it on your plants at some dosage or another will be happy with the unit! Or if you want more control then spring for a quality fertilizer injector that does the job a fertilizer injector is supposed to do: provide consistent concentration of fertilizer for maximum plant vigor and control. I also use a ball valve to control the amount of solute that is removed from the tank. If you want a volume estimate, that would be about 3.5 cups. Next I tried it on the slowest possible setting. 
Because of this, I aerate my water in a bucket with a paint mixer for a minute or two to get a fast, accurate reading. It sounds like this was there 1st time installing one as I have had to trouble shoot for them to get them to come back and make some adjustments. I think I paid around $230 or so for my MiniDos. I did make my own ball valve adapters to give me more fine control of the concentration, and checked them many times until I got too bored to worry about it. The injector will then draw off the max solute at a very consistent rate until the dry concentrate is all dissolved, then the mix will slowly weaken until nothing is left. You can prove it yourself with an electrical conductivity meter (EC) if you want to, but we hope you'll just take our word (and the good folks at the independent Peters Laboratories where this test was conducted) for our claim.". Neither one of them proportions anywhere close to the ppm indicated in the material that comes with the unit - AND, importantly, the unit is also wildly inconsistent in terms of ppm/ec readings. how much solute mixture is removed from the tax per volume of water, not the concentration of the fertilizer. And this, fellow GardenWebbers, is where it gets good. Dosatron is essentially a water based piston pump. 
This is because the injector is constantly adding water to the tank and this will dilute the liquids. If the EZ-Flo relies on the insolubility of the solid fertilizer, well now different solids have different solubilities and dissolution kinetics, so there's just no way they could work properly for all solids. Well, I've got a couple of them, and for home use they're wonderful. Of course I was not trying to inject vinegar or acids so maybe my experience does not count, but still it does the job. For that I would have had to send it back to the company from which I purchased it - at my expense. I need to respond to this thread as it is misleading. Maybe you should send them a copy of this thread to illustrate the damage that #13 has done. Then I started to get mad - I explained that look: I know he's just a tech support guy and the policy isn't his fault but the unit never worked as advertised - that the documentation differs from the site, that in any case it puts out WAY WAY over what it says it will in EITHER place and so on. If you had the same alkalinity as me, then the above numbers would be correct. Acid should be dosed according to alkalinity, not pH. Just need help selecting the right size Ez-Flo system, check out ourEZ-FLO Buying Guide. So: does EZ-FLO work well? As the flow of water increases the piston pumps faster. Pistol grip nozzles on the other hand, mess with the siphon mechanism. Sorry - just one more thing I want to add to this thread. Maybe it's genuine, but it seems awfully suspicious to me. That's 80:1 on slow. Did you ask to speak to #13's manager? The fact that you're almost certainly using mineral soil will mitigate some of the downsides of the unit - but you'd still be much better off with a steady application of a known quantity of fertilizer. I.E. Call us toll-free or email us weekdays for quick answers and helpful suggestions and support. So does EZ-FLO work well? Products do not require dilution or premixing unless using a Flo-Disc or the manufacturers recommendation. But I don't think anyone can provide a useful review of a product like this without testing the EC of their water, and so far, redshirtcat is the only one who has done that. penfold says 1.5Gm per gallon. As an example. Just fill the tank with 100% water soluble dry fertilizer or a concentrated liquid fertilizer and set the adjustment valve - it is that easy! I bought the smaller one, and then went back and bought the one with the larger bottle to avoid refilling as often. One question for you. Not EVEN CLOSE.
I like EZ-Flo because it was cheap. I'm hoping I can use some to remove some iron stains I accidentally got on my sidewalks. There are quite a few companies which make products that work. Hose Bibb Adapterwhich connects directly to an outdoor faucet with a hose thread backflow preventer (backflow preventer sold separately), The inlet/outlet bypass tubing (1 black, 1 clear), All EZ-FLO fertilizer injectors must have a backflow preventer installed to prevent fertilizer and other contaminates from entering your potable water supply, Hose threaded EZ-FLO systems are not designed for use under constant pressure and must be placed inline after timers or valves, Water pressure should never exceed50 PSI or tank may rupture, High temperature environments (where summer temperatures exceed 100 F (38 C) ) in combination with high water pressures may also cause PE & PVC plastics to weaken and the product too fail. For example, I have two different mixers - one is made of brass and dilutes 1:16 ratio, and the other is made of plastic and dilutes in a 1:20 ratio. At a 1:500 ratio, you would need to mix your acid solution at 750g per gallon in order to achieve a 1.5g per gallon solution after the injector. I wanted to be able to water at full flow.
I ask him if there is any way to make the unit run slower. One more thing. Maybe you don't test your irrigation water every day. I know EZ-FLO says it will work, but liquids just don't work right. They're just taking the manufacturer's word that it works as claimed. I would definitely check with DynaGro (call them, they are nice) and make sure the citric acid will dissolve into the FP and things will stay in solution. Alkalinity is the ability of a substance to resist a change in pH, so it is directly proportional to the amount of acid required. I could refill 4 times less often if the citric acid will mix with the FP in concentrated form. They don't care that it doesn't. I went through the whole ordeal after my experience. I have been using EZ-FLO products for years, and yes, I check the concentration with good digital meter. I can't see myself ever going back to inferior products. I forget many of the absurd things he said but one of them is seared into my memory: "You want this unit to function like a $300 injector" - whenever I would actually go through the trouble to test my irrigation water for consistency and note that it was 1) inconsistent and 2) massively over-dosing on fertilizer he would give me that line. Add the amount of fertilizer you want then fill the tank with water until all air is out of the tank. You can't change any settings. Straightforward lever/spigot controls are ideal.I use a long shower wand with a lever control. It looks like it should be a very accurate unit. At least I know I will most likely be working with cups not teaspoons for my application. I then figure out how many gallons it is going to take "empty" the ez-flo tank. Are you really weighing the citric acid? The mixing is remarkably accurate as far as I can tell (I used a standard colorimetric pH test commonly sold for hydroponics). That can be very confusing for people. 
Oh no, the hose end sprayers definitely worked.. I was willing to spend some money on a product that would do what the Ez-Flo website says it will. The cheapest starts around $250-$300. So I can technically vary the dilution rate based on how much I close the ball valve. The unit was still putting out *way way way* too much solution. I'm furious with these guys. I'd have to fill it every day, maybe twice a day on some days. All right reserved. Thanks for the warning, redshirt. I have two 5 gallon tanks installed. @penfold2- I typically read the forums for information on everything for quick fixes to my car to home repairs and in this case I was searching for fertilizer recommendations for my EZ-FLO. I've seen no issues with bacterial growth. I would recommend this for anyone looking for simple and easy general fertilization since that has been my use and it has been more than sufficient. As for precipitation I contacted Dyna-Gro and asked them about precipitation and they said that so long as whatever I'm mixing the fertilizer with is acidic I should see no precipitation. My unit was "working," the wire went through. This means that it will not give me *exactly* what I want but it was supposed to be consistent and "proportioning" until very near the end of the tank. 
Sounds like you're getting lucky though if it's working for you. The landscape company did come back and close the vavles that they installed with the EZ-Flo tanks and the results have not changed - 1 tank eventually becomes clear fairly quickly and the other tank remains colored with just minor dilution of the food coloring. EZ Flo works best when you fill the tank with a large amount of dry concentrate. He told me that he would not send me the part. The whole point of using an injector is to simplify things, and it kind of defeats the purpose when you can't trust the manufacturer's injection rates, and have to refill your container every day. At a pH of 5.8, all of the alkalinity should be neutralized, so that is a good target to aim for. I have 19 watering circuits with sprayers, drippers and T-tape, which are supplied through five fertilizer injectors. And I don't know if it means anything, but his username is also very similar to the last person to resurrect this thread with a positive review. See the video linked above for help with flow disc selection and installation. Many people don't bother with this, but it will give you a more accurate reading if your water has a high CO2 concentration. How much is your time worth to you? 
Had I been like most consumers and assumed that it was just because their was fertilizer coming out I would have done serious damage to the vitality of my plants or maybe killed them. Now had I only tested the unit with liquid fertilizers perhaps I would put some credence in your claim that it works as advertised with dry fertilizers. His results speak for themselves. The way I wanted it to work was the way it was advertised as working. Ok, fine. I can add 2 cups of water, no problem. If you're using FP from dynagro then you should have no problems. Has anyone else had a similar issue with a multiple tank system? Have you noticed any problems mixing the concentrated acid and fertilizer? It must be *very* acid and concentrated though? I wanted it to function as it is advertised as functioning. I have used these products for above ground strawberry planters, for in ground raspberries and blackberries, many vareties of grape vines, kiwis, tomatoes, potatoes, and landscaping plants. EZ-FLO Fertilizing Systems is a scam! I'm still waiting for my citric acid to arrive. Made of commercial-grade components, these fertilizer injectors are ideal for backyard gardeners, commercial landscapers and small farms. 
Anywho, for market growers who are fertigating a field, etc. So I called Ez-Flo tech support. Houzzers did, Landscape Architects & Landscape Designers, Outdoor Lighting & Audio/Visual Specialists, http://www.brewery.org/brewery/library/AcidifWaterAJD0497.htmland, What Chihuahuas Can Teach Us About Interior Design. 
From what I can tell, its a lot lower tech than ez-flo, and works through a purely physical mechanism intrinsic to the hose fitting itself. I explained that this was just bad customer service and so on. If you'll notice, pitts1234 just registered yesterday in order to resurrect this old thread with a positive review. The problem with the hose-end injectors is that they significantly throttle the flow so it takes about 5 times as long to water the same number of pots. *That is not what they say it will do.*. They do, however, perform as advertised and put out solution at the rates that you set them to. I saw no problems with a .25:1 and 1:1 mixture of fertilizer:vinegar. When testing with an EC meter at the end of the drip tubes it is close to where I want it and I seem to get fairly uniform application. So what do I do? Just to be clear, when I say 1.5g per gallon, I mean the injector is adding the equivalent of 1.5g dry citric acid to each gallon of tap water that passes through the injector. I would guess that 750 gm would be about 3 cups of citric acid. Or know that if you use an EZ-Flo you're gambling with the health of your plants if they are in pots. It didn't work for liquid fertilizers and I didn't test it with water soluble fertilizers because I was fed up at that point. 
I could see if you were hand watering at a high feed rate where the lack of accuracy would be an issue, but again it is not something I have experienced. The first thing to note is that they advertise that it works with liquid fertilizers. But if you grow in containers? You do not have to register in any forum to read the posts, but you must register if you would like to voice your opinion. I got it from QC Supply which was the cheapest source I could find. I think that it works just fine. And yes, dudadiesel is the same person I bought my citric acid from. I installed my tank according to the instructions. 
"You want this unit to function like a $300 injector" over and over. To answer some of your questions: No, they did not offer me a refund. If you are not finding the information you need or the information on this page is confusing, please let us know so we can help you (and others). I have never used liquid fertilizer in them. Earlier this year I had to deal with a mail-order nursery that sent me dead plants and refused to refund my money. I have little 12mL syringes that I use to mix manually and take benchmark readings - .25tsp of FP in my water should give me ~380ppm NaCl - not the 1100+ ppm that the Ez-Flo was giving me. I was moments away from ordering it until I read this post. The dosing schedule works just fine when you use dry or prilled fertilizer. That he is the "operations manager" - he just "WON'T" ship me the part. Of course, If you have questions, our friendly, knowledgeable staff is always happy to help. :). I will make sure to test my irrigation water before and after adding the citric acid before applying to any plants but, yes, this gives me a ballpark figure. If I understand you correctly, what you say seems to make no sense. Here's the thing: if this unit does not apply fertilizer in a consistent concentration (and it emphatically does *not* do that) - then what is the POINT of the unit? Ok, perhaps you are just a satisfied user. If you're growing in-ground where you have much greater buffering capacity and you can dump much higher concentrations of fertilizer with no problem then maybe you will be happy with an EZ-Flo. The system will mix the products automatically when the water is turned on. EZ-FLO fertilizer injectors require a low minimum flow of 120 gallons per hour (GPH), and will operate down to 7.5 GPH when the included flow-restriction discs are installed. Measure the water before adding acid, because adding acid increases the water volume. 
EZ-FLO injectors require a low minimum flow of 120 GPH, but can operate down to 7.5 GPH when appropriate flow restriction discs, included with the unit, are installed. I'd think you would just use a cup to measure it out. After I trust that it will work I switch to checking once a week or so and I make sure I use tracer dye in my concentrates so that if there's a catastrophic failure I don't burn my plants. I like voting with my wallet and thank you for your story. Hose-threaded units include a hose bib adapter, which connects directly to a faucet. The PPM listed on the EZ-Flo website is a liquid PPM injection. Cheaper and easy to fill. But have you checked? Click here to ask a question about this product, Drip Depot Inc 2022. This is what is depicted all of the marketing materials. I actually have spoken to Jeff several times when I was installing my mainline system earlier this year for my lawn. Assuming he knew what he was talking about (a poor assumption, I've discovered) that means the unit should be about 180:1 on slow with the initial wand in place. 
When using the 4 in 1 I lost a couple plants and I know that thing is not accurate at all, but I am pretty sure they have sold quite a few and probably 95% of the people on this site have one in their garage or tool shed. Had I not tested it I would have burned and killed plants in a matter of days (they don't appreciate pH values under 4.5). I figure out how fert I want applied each week and then dump it in the tank. 
Let me know if it works and stays in solution! 
You really need to test the pH of the output water, and then adjust as necessary.
- Olde Mill Inn & Grain House
- Cervix Menstrual Cups
- Easy Home Air Purifier Instructions
- Vince Camuto Slip-on Sneakers
- Tropical Furniture Warehouse