Hi so I have a 20 gallon tank that I had trouble with keeping a proper Ph. It was home to three goldfish for my Oscar in a other tank. I was planning to put my fish from my 10 into my 20 and all is good but my water is cloudy. Since I had Ph problem when I fed my Oscar his food I did about 80 percent water change and washed the filter and carbon filter ( with the aquarium water ) now my fish are in there and the water is cloudy. Could be a bacteria bloom? Help