Bio-Down

Bio-Down is BioBizz's organic pH reducer, made from citric acid sourced from citrus fruits. Unlike synthetic phosphoric acid-based pH down products, Bio-Down is fully organic and certified safe for living soil environments — it won't harm beneficial bacteria, fungi, or other microbes in your growing medium.

Use it to bring nutrient solution pH down into the optimal range of 6.2–6.5 for soil, or adjust as needed for coco and hydro setups. Add small amounts to your mixed nutrient solution, stir, and recheck with a pH meter before watering. Because BioBizz's organic nutrients naturally tend to buffer pH down toward 6.2–6.3 on their own, Bio-Down is mainly needed when your source water runs alkaline.

Compatible with all BioBizz products and any organic grow program. It has no NPK value and won't affect your nutrient ratios. Works in soil, coco, and hydro, though it's particularly popular with organic soil growers who want to keep their inputs 100% natural. A staple tool for maintaining pH accuracy without compromising an organic grow.