Aquarium filtration apparatus; Biological contactor for treatment of sewage and drainage water; Filters made of fiber for water filtration; Filters for drinking water; Purification installations for sewage; Sanitizing apparatus using ultraviolet light for sanitizing linens,surfaces of objects not for medical purposes; Water conditioning units; Water purification installations; Water softening units; Water treatment equipment, namely, cartridge filtration units; Water treatment equipment, name...