I'm new to the forum and have a few questions about re-opening our pool. The pool is a large, rectangular, poured concrete inground pool with what looks like a thin layer of plaster on the concrete and several various layers of paint over it. I believe it was built in the late 60's and its about 45k +/- gallons.
We bought the house last year, but did not have the time to open the pool until now. We live in Northeast PA. The pool was not opened for 2-3 years before we bought the house, and it wasn't opened last year either, Also the pool doesn't have any kind of cover. When we moved in, the pool was half filled with black water. From that time until about 1-2 months ago when I drained it, the pool continued to fill with rain water to about 6 inches below the tile water line. It seemed to hold water so I don't believe there are any (major) leaks. After removing about a 3-4 inch thick layer of leaves, etc from the pool, I pressure washed it probably 3-4 times and did an acid bath. I also cut out about 5-6 larger cracks and fixed them with hydraulic cement, then a layer of pool plaster patch over it. It looks like the cracks have been there for some time as there was some kind of epoxy or patch in them. So it should be good for a while until I can do a complete refinish of it. The neighbors say it was a very well cared for pool, being drained and painted regularly, up until that 3-4 years ago timeframe.
Anyway, I started filling it with city tap water from 2 hoses on Saturday about noon. It will be finished sometime this afternoon. The water has stayed clear while filling. I have the Taylor K-2006 test kit and performed initial testing yesterday. Here are the results...
Pool volume: 45k gallons
CYA: 0? Performed this test twice but the black dot did not disappear at all. Plus the mixture never turned even slightly cloudy.
I don't really know much about pools, but I've been trying to read and learn as much as I could the last few weeks. I've decided to reopen the pool following the TFP method. Correct me if I'm wrong, but it seems like I will need to SLAM the pool. But the Chlorine/CYA Chart doesn't list anything for 0 CYA. So should I interpolate and go for a Shock FC of 6-8? If so, according to Pool Math I need to add the following...
FC: Add 466oz of 8.25 % bleach
pH: Add 62oz by weight of washing soda or soda ash
TA: Add 740oz by weight of baking soda. (That's 46 lbs. 8-o)
CH: Add 1399ox by weight of calcium chloride (That's 87lbs. 8-o 8-o)
CYA: Add 240oz by weight of stabilizer
I'd like to start it up this evening and get the chemicals into it right after. Please comment if I'm on the right track or if I should do something differently.