Dumping water this weekend...not knowing my actual CYA (over 100), do you think I could get by with 50% drain? Or should we just keep going and get rid of it all?
What do I do now?
- Thread starter Homer
- Start date
- Jun 22, 2014
- 47,796
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Definitely do NOT drain it all. Never good. 50% - perhaps. Anything after that you need to be very careful. Last thing you want to do is damage the pool itself.
- Jul 3, 2013
- 9,028
- Pool Size
- 15000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool SJ-40
you can find out pretty close
take 1 quart pool water and 1 quart tap water and mix together, use that to do your CYA test, then multiply by 2
Great idea! Thanks! That's why I'm here. Looks like Mother Nature's working with me this weekend in Phoenix. High of 77 will ease my mind on the water dump, before possible 100's next week.
Dumped about 70%. mixed half pool water and half tap water. Got a CYA of 70. Question is, should we dump more?
- Jun 22, 2014
- 47,796
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
So to make sure we understand ... is that 70 before multiplying x 2 (actually 140), or is 70 your final CYA?
- Jun 22, 2014
- 47,796
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Great! Final CYA of 70. It's a personal choice now. I keep mine around 60-70 in the blistering summer. You might like it at 70 as well as long as you ensure to keep the FC in the 6-9 range - never below 5. Of course if you ever have to SLAM, it means an FC of 28, but if you stay on top of things that shouldn't be an issue. So it's really your call now.
- Jun 22, 2014
- 47,796
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Homer, a couple of us were talking behinds the scenes and wanted to make sure of something just one more time ... please bear with us okay ... when you said
We're sticklers about this one.
does that mean the solution was diluted like mentioned above (meaning you would still need to multiply it), or was the 70 your final no-kidding, non-diluted CYA result?
We're sticklers about this one.
OK, I see it now.. qt of pool water and qt of tap water mixed, now coming up with 60. Multiply that twice is what the actual CYA is?
- Jun 22, 2014
- 47,796
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
That's why we had to ask again .... just to make sure we were all on the same page.
- Jun 22, 2014
- 47,796
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
From your update above, you appear to have an actual CYA of between 120-140, so yes, more draining is required. Whether you can drain more now or need to refill to avoid going too low is up to you depending upon the ground stability under/around your pool. I suspect that ground is packed pretty hard, but you probably know best.
I might be confused on this one..I started the fill and CYA just tested actual 100 ppm with about half full. Will that CYA drop a lot more with fill water?
Oh! The high reading was with a drained pool? If so, you just need to fill it and the CYA will go down.
You got it Homer!! That's why we ask a bunch of questions and sometimes more than once. Can't wait to see this one get beat into submission!!
I'm glad you guys do ask questions. Sometimes I think I'm overthinking this process, which really is quite simple. And then I start thinking I'm an idiot for asking the same question 5 different ways. I'll get it, with all your guys help. Thanks!