pH Control

General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial.

This blend of organic acids lowers your nutrient solution's pH. It's our pH down. Don't worry if you over shoot the down: just add some Olympus Up and see the benefits of adding more calcium.

One of a kind in the industry. Olympus is derived from micronized limestone designed to not only raise the pH of your nutrient solution, but also to buffer organic acids from healthy soil decomposition. The calcium in Olympus is also very effective at tyi

For plants to grow their best it's important that the nutrient pH be slightly acidic - the range of 5.5 to 6.5 is considered ideal for most crops. The General Hydroponics pH Up (Base) is formulated using Potassium Hydroxide and Potassium Carbonate which a

For plants to grow their best it's important that the nutrient pH be slightly acidic - the range of 5.5 to 6.5 is considered ideal for most crops. The General Hydroponics pH Up (Base) is formulated using Potassium Hydroxide and Potassium Carbonate which a

For plants to grow their best, it's important that the nutrient pH be slightly acidic - the range of 5.5 to 6.5 is considered ideal for most crops. Our own pH Down is made with phosphoric acid. There are many pH down products on the market, but you get mo

The acid formulation uses food-grade phosphoric acid to lower the pH to the proper level.

Overdrive Your Plants for their Strongest FinishDuring the final weeks of bloom phase your plants need the ingredients in Overdrive to maintain flower maturation, flower growth, and overall vigor. Many growers neglect the last weeks of bloom phase, but no