I have been fighting with a green pool for a month,, It went cloudy grey a few times after shocking and using green to clean looked like it was going to clear up,and a day later it turned green on me, I have changed the sand out 2 weeks ago. I have used algeacide, green to clean and have thrown some shock in. I am getting to the point of giving up on it. My chlorine and PH keep going up and down. I have been stuck in this cycle all month. Shocking it, going grey, than back to green. I don't know what to do at this point. Thanks in advance for any advice.
Pool is above ground vinyl, 10,000 gallons. Using sand filter.