It's not designed well. I don't like the intake, the outflow, the filter body. The intake is so short it's useless. Of course you can probably buy extensions. The outflow is too close to the surface and is in too fixed of a position. If the water level drops even slightly, it makes a lot of water noise. And the filter body. They have this stupid "cartridge" thing. I don't know, I've used a lot of different filters and love love LOVE my canisters, but that is not a filter that I would ever buy again.
125 - BGK, chanchito cichlid, pictus cats, silver dollars, palmas bichir
125 - cichlids (severums, bolivian rams, chocolate), rainbows ( turquoise, red), loaches (angelicus, zebra, kuhli and horseface), plecos (BN, RL and clown), denison barbs, tiretrack eel, pearl gouramis, betta
90 - Congo tetras, african knife, upside down cats, spotted ctenopoma, kribensis, delhezzi bichir
2.5 - betta