k, so my fish tank is a new 20 gallon, and new gravel and a like three new fish decorations. i have one large fish(7-6 cm) and a smaller one (5 cm) and a farely new fish filter. but once i change my fish water( i usually change it once a week, but it has been so bad i have been changing it twice) it gets EXTREMELY cloudy. It doesn't seem to have algae( thats cuz it is sooo cloudy). i clean it very well and it still seems to be dirty. i was thinking maybe since whenever i transfer my fish they become ancy and so i put the stree-relief water contioner, but i am not sure. i was also planning on putting a second filter but i thinki should hear other suggestions first! thx so much! 