Hi, I am new to this site. I've read through a few threads and I'm not quite sure what my problem is this summer with my pool. We just had it installed towards the end of summer in 2014. My first two summers I had a Crystal Clear Pool. The majority of this summer it has been cloudy green, and after spending hundreds and hundreds of dollars at the pool store, I'm at my wit's end. It all started the first week of July, the Water started to get cloudy and then we woke up one morning and it was Green. We have treated for algae with the stuff recommended by the pool store, brushed the walls, brushed the floor, I'm not convinced it's algae. My pH has been high and my total alkalinity low the entire season and it won't budge with the pool store chemicals. I take a sample every few days, add the alkalinity increaser and the pH decreaser and I don't seem to get anywhere. I've added over 40 pounds of lo n' slo over the summer and the lowest my pH has been is 7.9 and that was only on 1 test. All the others have been 8-8.3. We have a 24 foot above ground, 15,000 gal, vinyl liner pool. Could the constant high pH be the cause of the green water? I did get it back to clear in the beginning of August after dumping extra pH decreaser in, that's when the pH went down to 7.9. But it's back to green with pH 8.3 and TA 95. Oh, and my chlorine stays really high, like 7-12 just with a stick in the skimmer, no shock.
Thanks in advance!