Cultivation Nation pH Down - Liquid Nutrient Solution Adjuster for Hydroponic & Soil Gardens, Lowers pH Levels - 40% Citric Acid for Optimal Plant Growth (Quart)

I’ve been using Fox Farm pH Down to manage the acidity in my hydroponic garden, and a little truly goes a long way. It’s especially effective for quick adjustments when you’re working with standard setups. However, if you’re using tap water or have an organic system (I use bacillus along with some other beneficials for root rot), this might not be your best bet. The product’s effectiveness tends to wane faster under these conditions. The reason? It’s primarily citric acid-based, which organisms can metabolize quickly. This means it loses its pH-lowering power sooner than you might expect, leading to potential fluctuations in your system. For more stable pH control in organic setups, consider switching to a phosphorus-based pH down. This type will generally maintain its effects longer, keeping your garden’s acidity levels more consistent.

I use this in my hydroponic system everytime I feel it because my ph is super high where I live. It works amazing at dropping it to the perfect ph level. Lasts a long time. And has only impacted my plants in a good way

Fox Farm hands down makes the best grow products out there. This stuff is so potent. My tap water comes out around 7-8 ph, and I want 6. I have a 6L hydro system and only need 1/8th of a tsp of this, which actually brings it down to 4 ph. I thought my PH tester was broken so I bought a new one, and it gave the same readings.

Always happy with fox farm they make good products

Its not concentrated but not 80% water like some companies. I would purchase again

It works as it's supposed to. Make sure to use a little at a time as it's pretty much trial and error. But does do the job well.

Wow! First time using this brand. With General Hydro’s pH down I had to use three times as much to get to the same pH on my tap water. I water multiple times per Day with runoff so I’m not very concerned about it being citric acid based and breaking down from microbes . Fantastic value, will last me three times as long and basically same price .

I can't say that it doesn't work because it does. It will lower the Ph level. The problem I seem to have is that It will not hold it for very long. I can add a couple ml of this stuff to the DWC and it will be back up after a couple of hours. Is that normal? I don't know but it really annoying. Going to grab another pH down product and test it out.