I have a 10 and a 30 gallon tank. The 10 gallon has paltry,s and mollusks. The 30 has terra,s and barbs. The problem is with in the last 2 weeks my both tanks have become a little cloudy. I have not over feed them. They get peas or Spanish once a week. Water changes are done every 7 to 10 days and most of the time half tank water changes. Even tried running the water thru a Brittany but to no avail. Also change filters at the proper time not every wAter change same with decorations. Can't someone tell me what I am doing wrong or make any suggestions. Both these tanks were Crystal clear about 2 months ago.