Quote Originally Posted by polyvue View Post
The implications are: In small pools with warm water, great circulation and a clean filter, the CYA may break down, most of it dissolving in as little as 1/3 of the turnover time.

Questions? Scoffs? Rebukes?
Very possibly but since this is not the majority of pools out there it is not information that I would call universally useful. It is useful to you in your own pool (and interestingly enough, does not apply to my small (under 7k) pool that I keep at 88 degrees year round and that has an oversize cart filter also and an oversized pump (because of the spa), and turns over in about 2 hours. It just shows that pools need to be taken individually and the guidelines to test after a week will be useful to the vast majority of pool owners.

You have to agree that a 'universal truth' is going to be much more useful than a whole lot of individualized ones and less error prone.