Chemistry at shut down

[pgershon]

I am getting ready to shut down my pool. I looked my pool chemistry and I have a pretty negative CSI. I could make it more positive by adding more calcium before I shut down. Is this recommended? (choline is low as I have not been paying much attention the last month as pool temp dropped and salt system pretty much shut down)

Clorine 2
pH 7.8
Alk 50
CH 275
CA 30
Salt 2700
Borate 10 (approx)
Water temp 50
CSI -0.53

 

[ajw22]

Your chemistry is fine for closing.

Your pH will rise while the pool is closed and the CSI will rise with it.

 

[pgershon]

thanks

 

[pgershon]

I am inclined not to bother with polyquat either this year. I dont cover the pool and I have to use a lot o choline/shock to get pool started in the spring. But I am used to it. At least I have a big net over pool this fall to keep the leaves out.