Hydra Bio-Sponge Filter – 10 gallon HA-145
Hydra Bio-Sponge Filter – 10 gallon Replacement Sponge
Hydra Bio-Sponge Filter – 20 gallon HA-148
Hydra Bio-Sponge Filter – 20 gallon Replacement Sponge
Hydra Bio-Sponge Filter – 30 gallon – HA-146R Replacement Sponge
Hydra Bio-Sponge Filter – 30 gallon HA-146
Hydra Bio-Sponge Filter – 5 gallon HA-147
Hydra Bio-Sponge Filter – 5 gallon Replacement Sponge
Hydra Bio-Sponge Filter – 50 gallon – HA-149R Replacement Sponge
Hydra Bio-Sponge Filter – 50 gallon HA-149
Hydra High Efficiency Sponge Filter 80
Hydra High Efficiency Sponge Filter 81