I was looking at using one canister filter for my new (to me) 300g tank. I was thinking about this one and some power heads for extra flow in the tank.
http://www.aquatraders.com/Aquarium-Canister-Filter-Odyssea-CFS-14i-p/42054.htm
http://www.aquatraders.com/Aquarium-Canister-Filter-Odyssea-CFS-14i-p/42054.htm