Oase Hel-X 13 Biomedia - 800ml size-22g This dock is designed to

This dock is designed to adjust with the water level

when food is used regularly

Back filter system with included sponge and ceramic noodles

The New Life Spectrum Optimum Flakes are suitable for freshwater and saltwater tanks and are ideal for small or top feeding fish

A high protein (50%) diet

Oase Hel-X 13 Biomedia - 800ml size-22g This dock is designed toThe Hel X 13 BioMedia for the BioMaster 250, 350, or 600 includes a replacement BioMedia allotment. The allotment contains 0. 3 gallons of Hel X BioMedia. Hel X BioMedia has a large surface area across this suspending media form which is ideal for biological filtration. It is best to only replace the BioMedia when you do a complete tank restart as to not disturb the beneficial biological load.