Canister Filter vs. Hang-on-Back vs. Sponge Filter: Which Is the Best Filter for Your Tank?
Choosing a filter should be simple, but all you have to do is visit an online store to be faced with dozens of models, different brands, and promises of “professional filtration.” In practice, the vast majority of tanks use one of three types: the canister (external filter), the hang-on-back (a filter suspended from the back…