Aquarium Sponge Filter with Suction Cups, Check Valves for 20-40 Gallon Aquariums | 4 Pack 24/7 Timer Aquarium Light Remove unsightly algae from aquarium

Remove unsightly algae from aquarium walls

A: The bags have a plastic zipper that closes the bag without any danger of rusting or leaching into the water

stones and ceramic rings)

Simulates Natural Rainfall

Aquarium Sponge Filter with Suction Cups, Check Valves for 20-40 Gallon Aquariums | 4 Pack 24/7 Timer Aquarium Light Remove unsightly algae from aquariumWhy Choose Sponge Filters for your Aquarium? Sponge filters provide both mechanical and biological filtration Easy to set up & clean: simply install an airline into the unit and turn on the air pump, simply rinse and squeeze sponge in tank water Using an air hose, connect one end to you air pump and the other end to this filter, and equipped with a check valve on air hose, to prevent water backflow and air pump damage due to power outage. It is a