I followed a combination of manufacturer and SWG Pool School on here last year... and when I closed my pool in late Sept, my levels were:
FC=9 (half shock level)
I just opened it today... here are my readings after opening and nothing added:
Now, I expected the FC to be zero and TA to be low, so that is fine. I expected pH to be higher, but was pleasantly surprised it held pretty well, since the plaster was new last year. What I am questioning is the drop in CH and Salt... and to a point CYA also. I removed about 6,000 gallons out of 32,000 gallons before I closed it. I also pumped a few inches out 3 times during the winter. At open, the water level was just about right. So, I know that I exchanged a lot of water, but I did not expect such a large drop in CH and Salt. Is this realistic? Or are these values skewed by temperature, FC=0, or something else?
I had a pretty good year last year (first one owning a pool). Only had slight algae in spots a couple times and had algae form behind all 3 of my color cascade bubbler lenses in the niche. I think that was from lack of water flow in there, BUT, at any rate, I want to make a couple adjustments this year. Are the Pool School SWG levels below still the recommended way to go?
FC: 3-5 ppm
Salt 200-400 ppm ABOVE recommended optimum level
Last year I kept my CYA 30-50 and TA around 100. If I adjust those two to the recommended levels above, would that possibly keep me from having the issues I had last year?
Thank you for your advice!