LogFAQs > #948584911

Honestly the canister filter is much more efficient because you can add whatever media you want on the inside and you always get 100% filtration. An overflow is fine, but what happens when it starts to get dirty, the water will flow over the cartridge and you lose a lot of filtration. A quality filter will save you from a lot more potential issues, an overflow is fine but if this is something you get into seriously, i'd suggest a Fluval 407 canister filter for your tank.

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