Water changes water changes. Don't get impatient sometimes it will take quite a few hours to clean up at the end of the cycle. Not that you want to use it as a "go to move" but the best thing to instantly clear up water is Acurel water clarifier, small red bottle. Works wonders, but I would only use it if your going to show off your tank and people are gonna be looking at it. Never use it to hide a water issue, always try to figure it out first.