FoxFarm Cultivation Nation pH Down for Plants’ Nutrient Solutions - Formulated with Citric Acid for Adjustment - Ideal for Soil & Hydroponics, Lowers pH Levels of Nutrient Solution - 1 Pint

Excellent Stuff for any type of plant whether vegetables or otherwise. I've used their whole line of liquid nutrients as well as a few of their soil nutrients and all my plants do considerably better when adding these products to them. ⭐⭐⭐⭐⭐

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.

Stronger than other PH Down products I’ve used, make sure to gauge PH after small additions, this product goes a long ways.

It’s a good citric acid based ph down. It is on the mild side in terms of concentration. I have hard water with a high ph and it takes quite a bit of it get a drop in ph.

Great stuff. I cautiously added just a little to my ten gallon reservoir, ph took a good dive. Had to add more tap water to bring it up to 6. I would recommend a ph meter. As water may differ in ph, so would the amount of solution needed per gallon. Add very small amounts, and test. This stuff is hands down solid.

Raise the pH it was good. It works good.

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.

Lowers pH quickly but has limited long term effectiveness in a 50/50 perlite/coco coir hydroponic system. The pH of my tap water is about 8. I added this product to my nutrient solution to bring down the pH to 6. One day after feeding the plants the runoff wastewater tested at a 7.6. So in summary it's good for a quick pH fix but the effect doesn't last.