Replacement Sponge Set for SOBO Canister SF Series Model:FM-20 They do not contain preservatives

They do not contain preservatives

These purpose-built caves provide the ideal sanctuaries for your plecos

Floating granules for all goldfish and other coldwater fish

With continued use

and glass test tubes

Replacement Sponge Set for SOBO Canister SF Series Model:FM-20 They do not contain preservativesReplacement Sponge Set for SOBO Canister SF Series Replacement Sponge Set for SOBO Canister SF Series is used for filtration and reduction of ammonia and phosphate in aquatic environments. 4 in 1 Multifunctional Filter Sponge High Quality White Filter Wool Super Activated Carbon Sponge Ammonia Reduction Filter Sponge Phosphate Reduction Filter Sponge FM 10 FOR 650F 850F 1000F FM 20 FOR 1200F and 1500F