I am new and posted on the "Introduce myself" thread. One of the recommendations was to exchange a lot of water for a fresh fill replacement with no metals. After reading some of the past posts on TFP, I see that it is not a good idea to completely drain a vinyl pool. I have already started draining water. How much water do I take out so I don't stretch or rip the vinyl? I am not sure how old the vinyl is. I would guess over 10 years. I thought it would be a good chance to completely drain it and scrub the bottom clean but I don't think I want to do that after reading more.