BioSafe ZeroTol HC, 1 gal ventilation/air-conditioning The strong

The strong

BPA and lead-free plastic

staple it down

Active Aqua's Grow Flow is the most efficient ebb & flow system on the market

It is safe enough to spray at harvest time

BioSafe ZeroTol HC, 1 gal ventilation/air-conditioning The strongZeroTol HC is a broad spectrum bactericide fungicide peroxyacetic acid chemistry formulated with the smaller grower in mind. ZeroTol HC is perfect for the indoor or hydroponics grower with 500 sq. ft. or less of growing space. It is a no residue, sustainable chemistry that is proven to keep diseases such as Powdery Mildew, Botrytis and Pythium at bay. ZeroTol HC has the ZeroTol name and research behind it, proven to stop pathogens in its tracks.