Quote Originally Posted by sisie5
tested again with the ps233 here are the numbers

FC-4.5
CC-.5
TC-5
PH-7.5
ALK-220
CYA-0
Sisie,
What all have you been using to chlorinate this pool with in the past? Is this a newly filled pool? What type of pool?

You will need to add some cya, (cyanuric acid) - also called stabilizer, or conditioner. Without it, you will not be able to maintain any chlorine in your pool. By the way, how does your water look?

Your alk is too high. Read at the following link for how to lower alk.

http://www.poolforum.com/pf2/showthread.php?t=191

Hope this helps. Post back with any further questions.

Watermom