Interpet sludge buster is suitable for use in cold water and tropical freshwater systemsr solid organic waste accumulates in the aquarium and blocks up filtersr it comes from fish excretion excess food and dead plantsr this sludge is unsightly and unhealthy encouraging disease causing bacteriar sludge buster is a culture of safe bacteria which speed up the breakdown of solid organic waster when to use sludge busterr when you want to improve the appearance of the aquariumr to reduce t