Product Features and Benefits Powerful, patented formula takes on tough calcium, lime deposits, scale and rust stains Cleans multiple items and surfaces including tubs, toilets, sinks, swamp coolers, HVAC, dehumidifiers, humidifiers, ceramic, porcelain, glass, fiberglass, cement, stucco , brick, stainless steel and more Many industrial and commercial uses in various animal healthcare settings Safe on all plumbing including copper, plastic PVC, etc. Septic safe; will not harm flow of septic and...