Hi, I'm fairly new to aquariums, my last tank was 30ish years ago. My roommates put me in charge of this 55 gallon with Black Moors, a calico fancy goldfish, an over grown comet, a small assortment of tetras, a common plecto and a siamese algae eater. The problem is the tank keeps clouding up. I do weekly water changes, vacuum the gravel, have reduced the amount and frequency of feeding but nothing helps - any suggestions would be helpful. I'm considering a complete start over....