I have a 6 foot long 85 gallon tank, 2 Penguin 350 filters running with 4 carbon filters going in each one. Typical gravel bottom, some fake plants, and a few decorations. Stock: 6" Jack Dempsey, 3" Red Devil, 2x 2" Green Terrors, 2x 2.5" Red Devil/Flowerhorn hybrids, 2x 1.5" Red Terrors, (in the near future 2x Managuense and a Dovii all around 1"-2"), and for now a couple gold fish that haven't been eaten yet. Between the 2 filters they are filtering around 700 gallons per hour. I feed my fish 2 small meals a day, once in the morning and once at night. I am having trouble with my water not being crystal clear. Maybe it's impossible but I want as clear of a tank as I can get. There just seems to be tons and tons of tiny particles floating around everywhere. One of my larger decorations is sand stone, could this be part of it? I do 2 20% water changes each week. Any suggestions will be appreciated, thanks!