Marineland Bio-Filter Balls for all C-Series Canister Filters. The Bio-Filter Balls provide a large, multi-faceted surface area for the growth of beneficial ammonia-neutralizing bacteria responsible for biological filtration.
- Fits all C-Series Canister Filters
- Provides larger, multi-faceted biological filtration area for the growth of beneficial BIO-Spira bacteria
- 90 Bio Filter Balls - each ball measures approximately 7/8" diameter
- Rite Size S
- Rite Size T