Jandy SWCG's "optimal" water conditions: why raise CYA?

Quote:

Originally Posted by rpoldervaart

I don't feel any burning. If my son swims in our pool, he'll have pretty clear eyes later on. He came home the other day after swimming in a public pool and his eyes were bright red. I have no idea what the chemicals were like in the public pool.

I'll second rpoldervaart's observation that a high CYA pool and free chlorine >= 4.0 doesn't lead to burning eyes. It's been a little over a week now since I upped our pool's CYA to 80, but in that time no one has complained about burning eyes. We swam after I used the Boost button on our SWCG, and so even swimming in a pool that had FC = 12.5 didn't lead to burning eyes or any eye irritation at all. I'd say we've had about 10 different people swimming in these conditions -- adults, teens, young children -- and not a problem at all.

But everyone's eyes are different, so what works for most people's eyes may not work for a few others.