CYA too high, how critical is it to correct?

[jacksonlui]

thanks for your reply.
I read somewhere that it's not a good idea to drain an inground pool because you don't want it to cave in and the pool is 30k gallons so it's going to cost a bit of money to fill it again.
Here are my specs. Any additional advice would be appreciated. thanks so much.

- Location: inland southern California (long hot/dry summers)
- 29k gallons
- Aquarite SWG (older model) using T-Cell15
- CL = 5ppm
- PH= 7.5 (tap water = 7.5)
- ALK = 150 (70)
- CYA =~150
- SALT = 3000
- Filter = Sta-Rite System3 Modular Media Filter
- load = 2 people once a week at 3hr intervals max

thanks
Jackson

[Sherra]

You do not have to drain it all at once. Do a 50% drain & refill...that should bring your CYA down to about 70-80. Then another 50% drain & refill would bring it down to about 40 or so.