- Aug 15, 2017
- 273
- Pool Size
- 36500
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Astral VX 7T
Hi all,
As usual I am really confused about CYA and testing.
I haven't added any CYA to the pool in the past 8-10 months or so (last Australian summer)
Back then I was pretty confident my CYA was 70-80.
Since then there has been lots of rain, back washes, etc...
So it would be natural to expect a drop in CYA.
I have tested, re tested, tested again, with different samples, new reagent, precise measurement 50/50 pool water / reagent with graduated syringe: my results show a CYA of 90-100 !!
Very confusing, so out of interest I took my water to the shop and 3 different shops gave me a reading of CYA 40.
I know about shop testing, but they all gave me identical readings which are in line of the logical drop in CYA over the winter.
Any advice??
I do not want to adjust my FC on a guesstimate of my CYA.
I've been keeping my FC at 7-9 in case my testing is accurate, but if my CYA is truly 40 there is not only no need to keep the FC that high, but i might want to increase to 60-70 for the summer.
Thanks all
As usual I am really confused about CYA and testing.
I haven't added any CYA to the pool in the past 8-10 months or so (last Australian summer)
Back then I was pretty confident my CYA was 70-80.
Since then there has been lots of rain, back washes, etc...
So it would be natural to expect a drop in CYA.
I have tested, re tested, tested again, with different samples, new reagent, precise measurement 50/50 pool water / reagent with graduated syringe: my results show a CYA of 90-100 !!
Very confusing, so out of interest I took my water to the shop and 3 different shops gave me a reading of CYA 40.
I know about shop testing, but they all gave me identical readings which are in line of the logical drop in CYA over the winter.
Any advice??
I do not want to adjust my FC on a guesstimate of my CYA.
I've been keeping my FC at 7-9 in case my testing is accurate, but if my CYA is truly 40 there is not only no need to keep the FC that high, but i might want to increase to 60-70 for the summer.
Thanks all