The non-chlorine pool disinfectant that i have used is called baquacil, active ingredient polyhexamethylene biguanide. It is used in various concentrations as a pre-surgical scrub, mouthwash and eye drops for ugly infections. Drinking poolwater with baquacil in it may well be better for one than drinking tap water. On the other hand, swimming pools collect everything that falls out of the sky. Remember the words of WC Fields when offerred a glass of water.