I have a 22,000 gallon inground pool. I have been fighting an algae problem for quite sometime now. Well now the water is a light blueish color, but I can't quite see the bottom of it. I've vacummed, shocked, added yellow out, clarifier, cleaned the filter, and added some stuff call pool aid. I can almost see the bottom in the shallow end. I had my water tested on friday and everything was fine. Can anyone help?