I wanted to see what people thought of Air stones, I have 2 in my tank, I love the look of them but I am not sure they are doing much good, I have a 60 gallon semi-planted tank and I think they are just causing too much current. Also wanted to know if fish can survive without them or is it their main source of oxygen? I'd like to do away with them but I'm not sure if I can. Would my fish survive with a filter alone? If so should I raise the filter to oxygenate the water? Someone please advise me!!!