3 way flow control for output flexibiltyFlip-Top for quick and easy maintenanceIncludes 2 foam pad cartridges, 2 carbon sponge pad cartridges and Biomax nodes3 stage filtration for superior water quality
I personally Have two filters on my 20 gallon tank. I have the Fluval u3 and the Aqueon Quiet flow for up to 50 gallons. Keeps my tank clear and keeps water changes at a min. I only do water changes once every 2 weeks. I'd say go with 2 filters just make sure they are not to close together.