I've had pools for years, but I'm having a brain fog I guess. Here's the deal. We didn't close our pool down this winter. We just run the pump any time that the temp was freezing or below. I've had a lot going on over the past couple of months and have been distracted. My pool is now a dark green. I checked the ph, which was over the top. I used the Pool Calculator to determine how much muriatic acid to use. I had to add it several times. I figured that today I would finally be to the point that I could finally shock tonight. I checked the ph today, and it's way up (over the top). Don't think it's the pool kit. It's the good one, can't think of the name and the ph stuff is fairly new. So I'm wondering what is up and what my next step should be. I haven't done any other testing, and I know the chlorine level would be 0.