When I first bought this thing (18' x 48", "Easy"-Set), I thought it would be easy ... Not so much. IRON / Hard Water Problems (your water is brown and / or green after filling it up). Scenario - You fill the pool - it looks clear - then you try to stabilize the water. When you add some chlorine (whether directly via liquid chlorine, tablets in floating dispenser, or using your salt water chlorine generator); pool turns brown! Don't panic ! Brown water is very likely due to high iron in your water. We live in the Northeast and have water full of iron, and other metals too. This can and will be filtered out over time. But, assuming you are using the basic filter system, it will take days or weeks depending on the amount of iron in there. Green Water (dark but not "soupy", light or tinted) is caused by various metals, most likely copper. First and foremost DO NOT READ ADVICE ABOUT ALGAE! If you just filled the pool it is not likel...