CSI/LSI - Acrylic Hot Tub

[TheMax]

Hi,

Is CSI/LSI applicable to acrylic spas.

My numbers:
Ph 7.6-7.9
CH150
ALK 50
CYA 18 now aiming for 25
Borates at 0 ( I have boric acid, but that messes my LSI/CSI even more )

Should I raise calcium to further improve my CSI/LSI score.

Thank you

 

[mknauss]

No.

You have sufficient calcium in the water to prevent foaming.

 

[TheMax]

Thank you, are rest of the numbers okay.

Thank you
Kris

 

[mknauss]

Yes. Low TA is a good idea as you fight rising pH due to aeration.