So I got 3 blue-spotted sunfish last month (I ordered 2 and got a little itty bitty baby one too). ever since I got rid of my 3 catfish that were too big for the tank, it has been much dirtier. I'm afraid to do a water change right now cuz the fishies are so small so I'm looking into getting an algae eating fish, preferably one I can get at a general pet store. any suggestions?