Does anyone have any experience with the Chlorease above ground chlorine generators? They seem to be available for around two hundred dollars. I'm curious how effective they are. I do know from reading the manual they need to be cleaned monthly. A salt water pool sounds attractive for a number of reasons but I can't find anybody but Chlorease making SWCG for above ground pools, and I'm somewhat skeptical of the device based on it's low price and not knowing anything about the manufacturer.