ecosmart is a copper ionizer that uses oxygen (not ozone) as an oxidizer. there is no residual sanitation in the water. Copper is bacteriostatic but will not kill viruses. The 2 biggest problems I see with the system are the introduction of copper into your pool which can stain the pool and the people in it, and the fact that there is NO EPA approved sanitizer being used. I wold not want MY family in that water!

IMHO, you best bet is to go with a SWG!