Hi,
My aquarium didn't look gross until I did a 1/3 water change and that kicked up all the garbage from the bottom. There is still a lot of yuck floating around after doing the water change that will, of course, eventually settle down to the bottom again. My question is, is my filter not working properly (fluval 304 in 40 gal tank with approx. 30 gal water) or are the polished river rocks in the bottom going to trip me up no matter what kind of filter I have? Should I get rid of the rocks or do a more frequent partial change than weekly?


