Testing Water Before Opening Pool

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R

rio

Member
Jun 12, 2017
24
Connecticut
Hi everyone,

When opening a pool, does the water need to circulate for a while before being able to obtain accurate results with a TF-1000 kit? Specifically, pH, TA and CYA, I'm wondering if my readings are meaningless if tested BEFORE turning on the pump.

Thanks!
 
Welcome to the forum! :handshake:

I assume this is existing water, not a fresh fill?

If so, it would be best to circulate the water for an hour or so before testing.

How does the water look?
 
Great, thanks!

Not sure how it looks yet. I'm gone on vacation and will open it when I return next week. But I did test it right before I left (last Thursday), and got 7.5 pH, 40 TA and very low (<20) CYA, which surprised me because it was above 100 when I closed it last fall (I realize this is too high). I definitely replaced a good 20% of the water over the winter, but not enough to explain that much of a drop in CYA. So I'm wondering if it can be mostly due to inconclusive testing. FC was zero... but didn't think adding chlorine would do anything without circulation [also, any chance this test could also be inconclusive without circulation?]. I'm expecting to find a green pool, so I'm starting to plan my strategy.
 
If you find a very green pool, with minimal CYA, I would suggest testing for ammonia right off the bat.

Plan to do the following:
Add enough liquid chlorine to get to 10 ppm FC based on PoolMath. Circulate pool 30 minutes. Test FC. If at 5 or below, add LC to get to 10 ppm FC, repeat until your FC test after the circulation is above 5 ppm.
 
Richard320 said:
If you got a lot of snow melt or rain in the pool, you could have it stratified. Running the pump will eliminate it and get everything all mixed.
Click to expand...

That's what I'm hoping. I have a mesh cover and we had tons of snow this winter.


mknauss said:
If you find a very green pool, with minimal CYA, I would suggest testing for ammonia right off the bat.
Plan to do the following:
Add enough liquid chlorine to get to 10 ppm FC based on PoolMath. Circulate pool 30 minutes. Test FC. If at 5 or below, add LC to get to 10 ppm FC, repeat until your FC test after the circulation is above 5 ppm
Click to expand...

Is this essentially the SLAM process?
 
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