Microbe Life Hydroponics pH Down pH Control Liquid, Premium Buffering for pH Stability, Decreases pH Levels, Use with Any Feeding Systems Including Hydroponics or Soil, 16 Ounces

Very potent so literally your best bet is to use a 1ml syringe and add 1ml at a time. I treated 5 gallons of water with just 1ml bringing the ph down from 8.5 to 5.2. With that said the size is great for the value. The speed at which it takes effect is less than 3mins. It’s easy to use if you go slowly. Definitely measure out the dose, otherwise the ph will bottom out which can be saved with ph up but you’ll end up making a chemistry project instead of feed water.

Works pretty great although when I received it in the mail the ph up way 1/4 short due to it leaking

I should have the read the reviews a bit more closely. I have used almost half of the bottle and my pH for the hydroponic tower garden is still at 7.5. It looks like I would have to use an entire bottle and even then I don’t know if it would work. I don’t like leaving bad reviews, but this one just seemed like a waste of money.

I use Distilled Water in my Aerogarden Bounty Elite hydroponics gardens. I also have Aerogarden Aerovoirs for each of my 3 gardens. Distilled water initially has a neutral pH but after exposure to air, distilled water absorbs CO2 and forms a weak carbonic acid solution at pH 7.0. I use the pH Down in the Aerovoirs to stabilize the pH to about 5.5. This refills the water in the Aerogarden Bounty Elites automatically with pH neutral water. Because this pH down uses citric acid (which kills algae growth), so I don't worry about algae growth in my Aerovoirs. This is a great solution for me. The result is that my Aerovoirs (between the two Aerogarden Bounty Elites), are algae free even in the presence of light! Phosphoric acid based pH Down alternatives DO promote the growth of algae.

Works great. But, it takes me 10ml per gallon to get my well water down to 6.6. I love this stuff, but I just can’t afford to use it when it takes 4x the amount than a phosphoric acid based pH down. Recommend for small grows, but not large.

For myself and my tap water 1ml/gal. measured at 6.5pH after resting. Your water may vary. Start slowly, let it sit and add more if necessary. USE A METER!

This product is very weak. It takes 3x as much as Humboldt, or bloom city. It will lower ph, but there are better options out there.

This is some really good and effective ph up and ph down for nutrient solutions. Is safe safe it’s effective and it comes with photosynthesis a secret that I think is phenomenal additive for your plants. I see more tri combs then I have ever seen in my plants after using this product . Give it a try

Unstable PH , i don't recommend it for hydroponics.

Super ! Enfin plus facile abaissé le PH

Awful for lowering ph. In a 60 L tank, I used about 1/2 of the jug and it brought it from 7.0 to 6.8. Awful. Do not waste your money.

Easily lowers PH with just a few drops

It works although a little pricey