Help with first SLAM

[ping]

I would say your initial test for the CYA level was off and that is why it took so long to pass all three requirements of SLAMming. You might want to lower the CYA now by draining or wait until next season if you plan on closing the pool soon. Either way, make sure you follow the FC/CYA guide recommendations.

 

[linen]

If the sun wasn't out and at your back the first time you tested, your results could be quite different.

 

[D&Jplus7]

Ping - That is exactly what I was thinking last night. I'm certain that must be the case and why it took so long.

Linen - I still can't remember, but the big discrepancy indicates that must have been the case.

I'm not sure at this point whether I'll wait to drain until spring or not, but either way I'll follow the FC/CYA chart until I close up this fall. I've still got a lot to learn, but I'm thankful this site gives me the opportunity to figure things out.

 

[linen]

At this point, since the water is clear (is it?) I would just maintain the higher FC level needed for that cya and fix the cya issue next spring (if it is a problem when you test in the spring).

 

[D&Jplus7]

Yes, the water is still clear. Will the CYA decrease while the pool is closed through May? I thought draining was the only way to reduce it and I won't be draining enough at closing.

 

[linen]

I was assuming you would be draining some water for winter?

If not, then it is likely your cya level may still drop a little due to dilution that might occur, pumping of your cover, etc.

In rare instances pool owners have experienced a cya reduction assumed to be due to a soil bacteria that basically converts the cya to ammonia over the winter. However, when this happens, getting rid of the ammonia in the spring is not fun. Again, this is rare.