Presently I have multiple old filters working on my tank, eventually when Godzilla gets bigger and is moved to a larger tank I'll get an adequate canister filter. In mean time the sum of what I have is covering things pretty well, though recently my Marineland Emperor 200's spray bar to its water wheel clogged. I already had API Biochem Stars in a clam shell insert in that filter so I removed the spray bar entirely and plugged it so all the water would route through the polycotton, bistars and then through the wheel. Low and behold it turns the wheel anyway so guess my 20 year old Emperor still maintains purpose in my tank.