High performance evacuation system cleaner. Fast Acting: Vac Attak’s organic chlorine formula facilitates the immediate breakdown of protein chains, found in bio-burden, into water-soluble amino acids. Safe and environmentally friendly: Biodegradable and noncorrosive to metals. Non-foaming safe for use with all pumps. Prevents scale build-up in pump that otherwise forms when using hard water. Economical and easy to use: One scoop of concentrated Vac Attack quickly dissolves into warm water and then is flushed through the system. Up to 100 uses. - 800g tub