One full bag about 1 lb

Features & detailsAquarium filter media is composed of selected materials rich in minerals and trace elements,Improve water quality microcirculation and enhance metabolism and Increase the energy of fish.The bio balls adopt hollow principle design ,It is conducive to the formation of the anaerobic zone of the digestive system,One bio ball bacteria culture area is 58㎡,you'll have clear water in a short time.Bio media with vast surface area and open-flow porosity, leads to effective ammonia and nitrate removal from aquariums and nitrate reduction.high-temperature processing not easy pulverization.A perfect biological filter media to use for sump tanks, marine and freshwater fish tanks, ponds, canister filter and hang on filter.This bio media is REUSABLE by rinsing in 5 years.