Hagen BioFoan Sponge Filter dual or single? dual needs stronger air pump.
Hagen Elite Sponge Filter? flat/rectangular not cylindrical, sticks to glass, has carbon insert - but my HOB should suffice. so maybe not.
ATI/Luster Hydro Sponge Filter?
ATI/Luster Pro Sponge Filter? requires or good with power head? wasn't thinking of buying a power head - so maybe not?
thks all!
Hagen Elite Sponge Filter? flat/rectangular not cylindrical, sticks to glass, has carbon insert - but my HOB should suffice. so maybe not.
ATI/Luster Hydro Sponge Filter?
ATI/Luster Pro Sponge Filter? requires or good with power head? wasn't thinking of buying a power head - so maybe not?
thks all!