I am wondering if I need to do a partial drain on my pool opening or not. I had a cover on that allowed sunlight and water through over the winter. I took the cover off today and it is a total swamp. I can barely see 3 to 4 feet down. Should I just get my pH right and then start shocking the snot out of the pool, or should I drain a bunch of the water and then refil. I am not worried about the cost of the water as I have a well.