CYA dropped?

[Lrinaldo99]

Hi all,

Today when we tested the pool, the CYA was 48. It had been at 80, right where it should have been. Why would it have dropped? PoolMath says to add stabilizer, is that correct? Will that change other results?

FC 7
CC 0
pH 7.8
TA 200 (I know this is high)
CYA 48

 

[tim5055]

How are you testing that you got 48 as your CYA level?

 

[Lrinaldo99]

With the Taylor test kit - the disappearing dot - rounding up it should be 50.

 

[tim5055]

With the Taylor test kit - the disappearing dot - rounding up it should be 50.

OK, now,we are on the same page. There is no 48, round to 50.

Have we replaced a lot of water? Heavy rains? Pool party?

Other than very minute amounts, the only way CYA goes down is with water leaving the pool.

 

[Lrinaldo99]

Ok. We have a slow leak. Yesterday I turned on the hose to add water and forgot about it, so I added more than I intended. Perhaps that is the culprit? If that is the case then should I still use the stabilizer?