Also known as alum, this product is used as a flocculant which attracts suspended particles in the water together (green or cloudy pools). Alum sinks everything to the bottom, which is then vacumned to waste. A small amount of alum can also be used as a sand filter additive.

Also known as Alum. This product is used as a flocculant which attracts suspended particles in the water to each other. Alum sinks everything to the bottom, which can then vacuumed to waste. A small amount of alum can also be used as a sand filter additive.

See Alum. Biguanide: (Pronounced BY-GWAN-EYED) A sanitizer which is part of a non-halogen (bromine or chlorine) water treatment system. Most chemicals used with chlorine are incompatible with biguanide treated hot tubs, and vice versa. The shock (see Shock) for biguanide treated hot tubs contains hydrogen peroxide.

A type of immune adjuvant (a substance used to help boost the immune response to a vaccine). Also called alum.