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🧪 Master your grow with the ultimate pH balancing elixir!
General Hydroponics pH Down is a premium liquid buffer formulated with food-grade phosphoric acid designed to precisely lower and stabilize pH levels in hydroponic nutrient solutions. Trusted by over 10,000 growers and ranked #1 in hydroponic pH control, this 1-gallon solution ensures optimal nutrient uptake and sustained plant health for professional and hobbyist growers alike.










| ASIN | B000FG0F9U |
| Best Sellers Rank | #1,463 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1 in Hydroponic pH Control |
| Brand Name | General Hydroponics |
| Customer Reviews | 4.8 4.8 out of 5 stars (10,810) |
| Global Trade Identification Number | 00793094015332 |
| Included Components | only product |
| Item Form | Liquid |
| Item Type Name | Premium Buffering For Stability |
| Item Weight | 2 Pounds |
| Manufacturer | Hawthorne Hydroponics, LLC |
| Product Benefits | Lowers pH |
| UPC | 714863970218 793094015332 |
| Unit Count | 1.0 Count |
S**N
Hydroponics must have!
So, you've taken the plunge and bought a pH monitor, thinking you're all set to embark on your hydroponic journey. But then it hits you—monitoring is only half the battle. Fear not, fellow green thumbs and budding botanists, for I have found the yin to your pH monitor's yang: General Hydroponics pH Down.This product is, in a nutshell, a gardener's best friend. It's like having a magic elixir at your fingertips, ready to correct any alkaline audacity your water dares to exhibit. With just a few drops, you can bring your solution from the precarious heights of pH imbalance down to the serene valleys of perfect acidity. And why is this important, you ask? Because your plants are picky eaters, and pH Down ensures they get the nutrients they crave in a form they can absorb.Now, let's talk about ease of use. General Hydroponics has somehow managed to bottle simplicity itself. A little goes a long way, and with the detailed instructions provided, you'll feel like a pH wizard in no time. But remember, with great power comes great responsibility. Always monitor your pH levels to avoid turning your hydroponic setup into an acidic wasteland.Durability isn't usually a word associated with liquid products, but in this case, it's about the lasting impact pH Down has on your system. Consistent use helps maintain an optimal environment for your plants, contributing to their health and vitality over time. This isn't just a quick fix; it's a long-term solution for sustainable growth. In essence, General Hydroponics pH Down is the silent guardian of your hydroponic system. It works flawlessly with your new pH monitor, ensuring that your plants thrive in an environment tailored to their needs. If you've invested in monitoring your system's pH, investing in pH Down is a no-brainer. It's like buying a shield to accompany your sword, preparing you fully for the battle against pH imbalance. I wouldn't dream of running my hydroponic system without it.
R**R
Works as described.
I use this for my DWC setup and works as described. I continue to buy it when I run out.
S**D
Does exactly what I want it to do
This PH Down works even better than the aquarium brand I bought; it takes a lot less product to lower the PH of my plant water in my 6 cup watering can. I go from a PH of 7 or 8 down to 6.5 on 1ml or less. I bought a 4oz glass bottle that comes with a 1ml dropper to help me control the drops.
H**S
good value
Great value for the money
C**G
Top Quality Product
Quality PH Balancer
A**R
Does what it is marketed to
It's pH down to use with hydroponics / growing so nothing crazy to write about. Use as needed whenever your water is above the ideal range. I bought mine in 2021 and have had some inconsistent results with it recently where a small amount brought the pH down more than it usually would. That's happened three times now so I took some time to shake it and hopefully that resolves the inconsistencies. If I can't figure that out then I'll replace it since I don't like not being able to estimate how much to use for a certain pH and volume of water. MSDS sheet from 2021 I found indicates its 10-17% phosphoric acid. Therefore I put value for money pretty low since you can buy food grade phosphoric acid at 85% for pretty affordable prices and dilute it yourself. If your churning through this stuff and want a more affordable option I would suggest you look into that.
P**S
Always my go-to
Works great. Lasts a good while too.
P**T
Works with plants
Worked amazing for all my plants!
T**E
First off, what ph meter are you using? I have 3 different ones from Amazon, calibrated all in the same solutions, at 25 C, all give me different values. They’re useless. If you want to be more sure, you should also have test strips or test fluid. As for all the reviewers saying this doesn’t work, that they had to use a whole bottle or whatever to get to the ph value they were after.. I question your water source. I recently put in an RO system to use for my plants. On my old hard water (about 240ppm) it would take about 8.5ml of ph down to get my 4 gallon jug of just water (for flush) down to 6.0 from about 7.5. Now with RO water measuring 002ppm before adjust, I started on another 4 gallon jug with 3 ml, and it brought me down to 3.5. So I tried a gallon jug, I dipped my finger in the down, then into the jug. I don’t know how to add any less that that? Well, it took my 7.1 down to 4.2. INSANE. This stuff definitely works, too well. I’m new to RO, so I haven’t tried with nutes yet, but I’m hoping once I have a higher ppm in my water from the nutes that it will be less sensitive to adjust the ph. If you have water under 010 ppm and it takes more than a few drops to get your value, you should try another method of testing your ph, because your meter might be lying to you. Some other things to consider is how are you adding your down? Is the tool clean? Have you tried balancing just water? Because maybe it has something to do with the combo of nutes you’re using, or the ppm you end up at with your nutes added. See, this is the problem with online reviews. This didn’t work for someone because they unknowingly were using it wrong, then they leave a trash review. I also have the root farm ph down, and the standard hydroponics down, and it seems to work exactly the same, just as powerful. I haven’t tried the Indo brand yet, but I’m willing to bet it works just as good. So to summarize my opinion, if this isn’t adjusting your levels with just a few drops, I think you have other problems, and that this stuff works great. And to be clear, I bought this myself, I have never had any products shipped to me in exchange for a review. I am a very happy customer of all General Hydroponics products, I run their 10 part nute system in my soil grows, and notice a benefit over using the Indo nutes I started with a couple of years ago. Keep your patients, you’ll get it all figured out soon. There are a lot of areas to master in growing Mary, I’m FAR from it. Ph is an important one, some strains are more forgiving than others, but if you’re too far out your plant might (probably will) stop taking in nutes, and that’s no good.
竹**亮
少しで、めちゃくちゃ下がりますよ。気をつけて使用して下さい。
S**I
Phの調整に最適ですが、結果が出るまで時間がかかります。 添加後、最低30分ぐらいしてからPhを測らないと正確ではありません。 添加してもあまり変わらないと思って、さらに添加すると30分後大変なことになります。 1ml量れるスポイトがオススメ。
J**Y
Bought this several times now and it's always what I paid for
K**A
It only took 3ml to 5 gallons of tap water to bring the ph from 7.5 down to 6.5.
Trustpilot
2 days ago
1 month ago