Hello everyone. I'm new to posting, but have been using this site for a few years. Normally don't have much issue with my pool, but am curious about this one.
I check my pH, FC, CC, Alk daily. I use Clorox bleach with no additives (scents, etc.) to sanitize, using an average of 7-8 ounces a day to maintain around a 2-2.5ppm level. I do that because I use a mineral pack, which I realize most don't approve of. I've been using one of two types for 11 years now and not much out of the ordinary seems to happen.
Not sure why, but this year I have been having to add sodium bisulfate regularly. Approx 165 ounces (weight) in the month of August, not including today. The weather here hasn't been much good for swimming this year, meaning not sunny, but particularly wet at all. Because of that I've kept a solar cover on most of the time to keep evaporation down. About a week ago I noticed my pool getting a little dull. This week it has gotten much worse and I've been trying to correct it. Yesterday my FC was 3.6 and CC was .1. I added 40oz of 7.5% bleach to try to shock it. Today it looks worse and the pH has risen from 7.47 yesterday to 7.95 today. Here are the rest of my numbers today. FC 3.6, CC .1, pH 7.95, TA 90, Calc 255, CYA 50, TDS 725. My SI has been between -.06 to .03 until this week. This week it started at .06 and is now at .43. Not good. I have no aeration going on and the only abnormal thing this week is on Sept 1st we received about 1" of rain.
I can't think of anything else I can add. Since this is the first time I've posted, I'm hoping my signature pulls over with all the specs on my pool. If it doesn't, I will come back and edit this post. I appreciate any help I can get. Before I sign off, I have started adding Sodium Bisulfate to lower the pH today. I figure about 40ounces over the next two days.