I have a 55 gal tank with 2 small (4") RES, 1 12" pleco and a horde of guppies (supposed to be turtle food, but the turts think they make better roommates!) and I'm using a fluval 403 (just set up about a month ago, got it used) and I am having a hard time getting the tank to look clean. I have been doing 30%-50% water changes every few days to keep the amonia and nitrite levels down. I know the tank has been trying to cycle, but with a filter as strong as this i would think the water should be clearer. I had to put a coarse sponge over the intake after rescuing 30 guppy fry from the filter at midnight last week



