Fluval,eheim,marineland are very good brands.when I first had my 55 gallon set up,my brother gave me his 5 inch pleco,since algae was building up,I would highly recommend though a hot magnum 250 for that tank.I had one set up my 55 gallon running with the penguin 350.I was blown away on how much stuff the hang on canister captured.I have some fishes that produce quite a bit of waste in my set up now,so currently I am running a Marineland magnum 350 canister and the marineland penguin 350 powerfilter on my 125 gallon tank set up.The prices on those 250 canisters are cheap on petsolutions even at certain pet stores like pet supplies plus.I could of easily sold you my 250 for 30 dollars,but my brother now has it for his 55 gallon tank set up.