I use a large Jungle Goldfish Sponge Filter (rated for at least 60 gallons of goldfish tank water) in a 15-gal tank.
(I; use; a large Jungle Goldfish Sponge Filter; L:in a 15-gal tank) (a large Jungle Goldfish Sponge Filter; rated; for at least 60 gallons of goldfish tank water)
I a large Jungle Goldfish Sponge Filter
use rated
a large Jungle Goldfish Sponge Filter L:in a 15-gal tank
for at least 60 gallons of goldfish tank water