Quote Originally Posted by BigDave View Post
No, I think your test in May was bad and you've building CYA for years.
Cold water + inadequate wait time may cause false low readings. 'Guess strips' are ALWAYS subject to false readings, especially with CYA testing.

Perhaps Ben will advise you regarding running a pool with CYA at 270ppm.
I can -- but you'll have to decide. Do you want to run a pool with some odd adaptive chemistry? The POOL will be fine, and SWIMMERS won't notice, but it will mess with YOUR mind some.

Your alternative is to have it professionally drained, and even then, if the liner is more than 2 - 3 years old, you may lose the liner.

There *IS* another way to drain it in place, but you'd need to buy a 35 x 55 winter cover, in order to do so.