According to pool math, At a CYA of 30, your 20k gallons need a little over 1/2 gallon per day for 3ppm. (77 oz). When it’s hot you would need more and cooler/less, but if we used 1/2 gallon as the average daily dose at a cost of $2 a day, You would hit the $600 SWG cost in 300 days. That’s 2 years in the short northern season and 1.25 years or less in TX.For me it would take about 6 years to go through 150 gallons
5 years is generous. When I worked for a large foundry they pushed for 18 to 24 months roi for cost reduction projects.I forgot about the convenience factor. As an interesting note, the university I worked for in college would use a planning factor of 5 years return on investment for any major purchase or upgrade. I have tended to use that in my personal decisions on improvements or upgrades (refinance, new windows, higher efficiency heat pump, etc.). Of course the pool was a complete splurge!!
I use about 3-3.5 gallons a week. So, I would use 150 gallons in about a year and a half of swim season. I would probably go with a SWCG, but my pool manufacturer states that its use would void the warranty on the pool.I agree. Just doing public math (always dangerous), a $600 SWG equals about 150 gallons of Bleach @ $4.00/gal. I have seen bleach less, but this is a close swag. So how long does it take to go through 150 gallons?
That’s amazing! That’s what I would do on a cloudy day. Not now.I usually dose about 1 1/2 to 2 cups chlorine daily in my 4024 gallon pool. That's 6.5% -- when I have 10% it's less. I used to maintain at 6 ppm FC but since my mustard algae episode I'm going to max out to 8 ppm. I generally lose 2 ppm FC daily, on bright sunny days. CYA is 50.