Cool, thanks for the kudos! BTW
, you probably should buy one with more flow rate than the manufacturer's recommendation, especially if you have messy fish. Firstly it gives you room to grow if you ever upgrade tanks, and secondly, you could get away with less frequent maintenence if you "over-filter". Most folks here are in the order of 10x GPH
to tank size ratio. (The only problem is if you have slow moving fish that don't like the strong currents.) Lastly, there's a lot more room for media in the larger models, which gives you more capacity and media options for bio-filtration.
EDIT for completeness: Sometimes the GPH
numbers are over-inflated by some manufacturers for marketing reasons, and they are calculated for an empty canister instead of one stuffed with media. I think Rena publishes both and Eheim does a worst case with media and a stocked tank.