Trying to dial things in before the summer

[carruth98]

Hi everyone,
I've been reading a lot here on the forums and on the main site, and I made the switch from pool store testing and advice to the TFP method earlier this month. Thanks to all of you who've shared your knowledge--it's already been a huge help.

When I started, my CYA was around 200, so I did a water exchange (pumping out while filling) to bring that down. I'm still getting the hang of testing, but I've been testing every evening and adding liquid chlorine as needed. I'm using a TFPro kit and tracking everything in the PoolMath app.

My kids have already started swimming a couple times a week, but I really want the pool dialed in before school is out in a month--once summer hits, they'll be in the pool nearly every day.

I'll attach screenshots from the PoolMath app showing my initial and most recent test results. I'd love feedback on whether I should lower my CYA further or make any other adjustments now to make daily maintenance easier once we're in full swim season.

Thanks in advance!

 

[PoolStored]

Welcome to TFP.
Everything looks, I wouldn't do anything at the moment. Your CYA is very high, but will degrade 5-10 per month.
You need to always follow this. Link-->FC/CYA Levels
If you need to dose higher, that that when you test the next day, do that. For now, use 12 as your target. Dose higher so you test 12. Don't let it get below 10 when you test.
I would also do an OCLT to confirm you don't have algae. Link-->Overnight Chlorine Loss Test
You fail OCLT, then you need to replace about 50% of your water, then follow the SLAM process. Link-->SLAM Process

 

[ajw22]

Welcome to TFP.

CYA of 90 is a a bit high but ok for TX. It will degrade over time in the Houston sun.

So while you may think you have things dialed in, at least monthly, you need to check your CYA level and adjust your FC target.

 

[carruth98]

I did the OCLT and my FC went up 0.5 ppm overnight (which isn’t actually possible), but I definitely did not lose more than 1 ppm. I would guess I can chalk that up to measurement errors. I took the sample from the same place in the pool. I did have the pump running all night (would not have increased the chlorine, but maybe mixed in better what I added last night). Can I consider that passing the OCLT or is something unexpected happening? Thanks!

 

[PoolStored]

Just testing error. Test your CC.