I've noticed a couple spots on my liner on the bottom of my pool that are turning green :/. My chlorine is between 5-10, ph - 7.5 and my CYA is 50. Any advice. Im close to closing the pool up and don't want this to create a bigger problem next year. Any advice appreciated. Thanks!!!
PS - i've just been putting in diver dave to cure the problem but they keep coming back.