I'm doing the calculations to try to make an educated decision on whether or not to buy a SWG.
I've read here that losing 1/2 of the FC each day is a reasonable expectation. My FC target is 6, so that would be a loss of 3 ppm of bleach each day. The Pool Calculator tells me that for a 27Kgal pool that would be 170 oz of 6% bleach per day.
We swim from May to October, and obviously the target levels for all chems apply during that time. How do I calculate the chemical usage during the off season? (We don't actually close the pool, but I'd imagine with different atmospheric conditions and pool use that the demand would change or do I maintain the same target numbers all year?)
Using the 3 ppm FC loss value over 12 months, it comes out to 478 gallons/year. Buying bleach at Costco (three 182 oz jugs for $6.99) I'm looking at $784/year in Clorox. Wow.
At that rate, the return on investment for a SWG seems like a no brainer. Should I be figuring the same bleach usage amount all year long?
If I went with the SWG, what should I estimate for the cost of electricity for the SWG? Salt?
Thanks in advance for any help. I apologize if this was too many questions or too much info, I wanted to try and be thorough.