Hello-

My 7 year old daughter has what is at least a moderate to somewhat severe respiratory allergy to chlorine. As soon as she starts using the pool and in ground tub tub for any length of time, she develops a terrible cough, lung congestion, etc, all of which ends up in her needing to use inhalers, a nebulizer, etc.

The in ground pool is, as best as I can tell, something around 15,000-20,000 gallons and the in ground spa is around 600 gallons. The pool and spa are completely separate (i.e. not a spillover spa). Both pool and spa have solar heating panels on them and the spa hangs around 100-104F while the pool is 87-88F (this time of year, but will be less during the dead of winter). The pool uses a DE filter while the spa is a cartridge type. The 1 hp pool and spa pumps run 8+ hrs a day each.

For sanitation, the pool is currently fitted with a DelOzone Eclipse 4 ozone generator and Ive been using chlorine in addition. The spa is chlorine only. I add chlorine via floating dispensers.

I need to find a way to get the chlorine level as low as possible and still have a safe pool. Maintaining a FC of 2 ppm in both the spa and pool (which is obviously not very high) has resulted in fine water quality even with the hot water in the spa, but this level still gives my daughter the terrible symptoms.

I am considering adding ozone to the spa, and then also adding the Nature 2 to both the spa and pool in an attempt to get the FC down to >1.

Is this approach with the ozone and Nature 2 in both pool and spa worth considering? If not, what is my best approach for mantaining >1 ppm FC? I see alot of claims of 0.5 ppm FC being possible, but was hoping for some empirical feedback from other folks in the same situation.