- Jul 10, 2016
- 43
- Pool Size
- 25000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Jandy Truclear / Ei
I'm a first-time pool owner. We're taking possession of the house/pool next Friday. The pool has been "maintained" by a "professional" pool company once a week, 52 weeks a year (no closings). I've been testing the water on my own to get a feel for the way it's been taken care of and am less than pleased. CYA is obviously high. pH is off as the FC is too high to get an accurate reading. My question is this, based on the CYA level, will be I be OK to let the FC level drop when I switch over to SWCG without lowering the CYA via drain or hammering it with higher levels of FC to reduce it? I saw this: Pool School - Chlorine / CYA Chart and it leads me to believe it *might* be OK once I make the switch to saltwater. Will higher salt levels at the get-go also help to break it down? I read this paper that seems to indicate salt might decompose CYA at a 3.5% salt solution. Obviously I don't want my salt ppm that high, but wondering if anyone else has any info on CYA decomposition at lower levels of salt: http://aem.asm.org/content/28/6/1004.full.pdf
Readings from the pool currently:
Thanks for any and all input!
Readings from the pool currently:
- FC: 14.5 ppm
- CC: .5 ppm
- TC: 15 ppm
- CH: 225 ppm
- CYA: 90-95 ppm - based on the TF-100 test being logarithmic and result being between the two but much closer to the 90 line on the graduated cylinder
- pH: 7.5 - obviously off since high FC, but assuming it is actually a bit higher based on FC lowering pH
- TA: 70 ppm
- Temp: 85° F
Thanks for any and all input!