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On 8/28 the water was slightly cloudy and green after having been perfect all summer. pH 7.2 FC 7 TA 60 CYA 40 I added 14 lbs of baking soda and 40 oz of washing soda to bring pH to 7.6 and TA to 100 I thought things were improving but slowly. The suddenly on 9/6 the water was dramatically...

I have an old pool with a main drain, a return line and overflow only. I have a make-shift vacuum with a hose that sits on the edge of the pool. I’m wondering if it would be possible to turn the overflow into a skimmer. Any suggestions, advise, etc? This is the current piping arrangement:

I have a 70 year old concrete pool which was painted with chlorinated rubber paint 4 years ago. I’d like to repaint just at the water line without emptying the pool. Is TSP ok for the pool water?

I'm on the on the fourth day and realize I've made several mistakes. Here are the readings from day one: pH 7.7 (first mistake) FC 4 CC <.5 TA 90 CYA 30 CH 275 I think I should have lowered the pH, but it's too late now. I had persistent algae, which I assumed was mustard because it was there...

Is it essential to bring the TA to the correct range when adding borates? My TA never gets below 120. Today's readings: FC 4.5 CC .5 PH 7.7 TA 130 CYA 30

I'm curious to know if there are others in this forum who have old pools. Mine is 62 years old. I'm considering SWG and am wondering if it might be corrosive to my main drain pipe which is cast iron.