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SunSun HW-302 "Out Side" Filter   Summary   The SunSun HW-302 is a 3-stage (multistage) 1000 litre per hour (roughly 264 US gallons per hour) external canister filter (as rated by the manufacturer). Built like most other canister filters, the HW-302 contains 4 filter trays used to store your...

Would it be better to buy 2 smaller heaters for a 55 gallon tank for each end of the tank or would 1 300watt for up to 75 gallons heat the tank evenly?? Thanks!!!