i have a 90 gallon planted freshwater tank and lately its been very cloudy and no matter what i do it won't clear. It has sand bottom so i usually have to put a little accu clear in to get ride of the very small particles floating around but its not working!!!! I was wondering if it was an algae problem. I scrape the sides every otherday to keep the algae to a minimum. Is the algae floating around now? I tried a water change, that didn't do anything, cleaned the filter...that didn'ty help either...i'm all out of ideas so if anyone can help me it would be appretiated, thanks.