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I'd get a filter that says it will filter a tank around 150g or so. Or you could get two filters that say they filter 100g each.
Fluval makes a good canister, as does Rena. I'd go with two fluval 305's, a 305 and 405, a Rena xp2 and xp3, or a rena xp4... or you could go with the bad boy, the fluval fx5.
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