Need help with extremely low PH. High CYA and TA
- Thread starter Nicholasholmes424
- Start date
- Jun 22, 2014
- 52,017
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Your first order of business needs to be lowering the CYA. There's no sense trying to adjust anything else when water needs to be exchanged. So I would first exchange enough water to get the CYA down around 50 if you can. This may take more than one water exchange effort. Even if you stop with a CYA of 70, that's somewhat manageable, but over 100 no way.
Start with the CYA first then come back and post new test results and we'll give you a good get-well plan ahead. Enjoy the weekend.
Start with the CYA first then come back and post new test results and we'll give you a good get-well plan ahead. Enjoy the weekend.
Did you see how high it was on the test kit. OMG it's at the very bottom. Probably 200+ They were using Trichlor and Dichlor and no test kit. Just thinking clear water is ok. Those both raise CYA and IDK how long they been doing it.
- Jun 22, 2014
- 52,017
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Yes, very common for newbies who arrive at TFP after years of pool store advice. I suspect it will take several water exchanges to finally see movement in the CYA test, but you'll get it.
Endro32
Well-known member
Wow, wish our well water was that pure.
At our Arizona campus, we top off with RO treated water because the raw well water has so much junk in it from the farms around us. That has a low pH and low TA as well, and I've found that because the TA is so low, it barely affects the pool pH. In fact, I usually still have to periodically add acid as the pool pH rises from outgassing. Hopefully, it'll work out the same for you.
But yeah, get the CYA under control with drain/refill first, then run a new set of tests to start getting everything else in balance.
At our Arizona campus, we top off with RO treated water because the raw well water has so much junk in it from the farms around us. That has a low pH and low TA as well, and I've found that because the TA is so low, it barely affects the pool pH. In fact, I usually still have to periodically add acid as the pool pH rises from outgassing. Hopefully, it'll work out the same for you.
But yeah, get the CYA under control with drain/refill first, then run a new set of tests to start getting everything else in balance.
So I just did a High CYA test. Filled to 7 added bottled water to 14. Drained off to 7 and added fresh water again. Drained to 7 and added R13 ro 14 and the result was 80. So I multiply x 4 due to I diluted once which made 50% pool water. Then I diluted that which made it 25% correct? So at 25% pool water the CYA is 80 so 80x 4 which I 320. I already Drained and refilled 12 inches of water also. Going to drain now to 12 inches above the shallow end and refill.
- Jun 22, 2014
- 52,017
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Oh yes, I'm afraid you're going to need to exchange much more. You have a good sized pool. You can take it lower than 12" at a time if you wish. As long as you leave plenty of water remaining to keep the liner pressed-in tightly it should be fine. But go with what feels comfortable to you.
They have a shallow well so I'm afraid to drain too much . They have 3 houses using the that one well. Unless said when the filled it the first time they had a truck bring 27,000 gallons of water and filled the rest with the well. I don't want to dry out their well. It's 90+ degree days here in Ga and hasn't rained in weeks
Similar threads
