Hi, recently I have been experiencing an odd cloudy water issue in both my 29 gallon and 5 gallon tanks. In the 29 gallon there is: 2 rams, 4 Celestial Pearl Danios, 3 Harlequins, 1 yoyo loach, 2 khulis, 1 female betta, 3 ottos. The five gallon has 2 dwarf puffers. The 29 gallon has been up for over a year, the five for a couple months. The 29 gallon has 0 ammonia, 0 nitrites, 2.5 nitrates (has many plants). The five gallon is ALWAYS 0-0-0 (has a ton of plants). I have never had cloudiness trouble with the 29 gallon, the five gallon has been getting cloudy on and off since I set it up. Both tanks get CO2, ferts, water conditioner. Both tanks got a whiteish grey cloudiness about 4 days after water changes (I change 30% water once weekly in both tanks). The 5 gallon has a sponge filter and the 29 a bio-wheel filter. The bio-wheel filter doesn't have as much 'pull' as it used to, I dont know why.