First time poster but I love the forum and have dug through it for hours. Got a quick question.
I got a Caldera spa with an in-line Spa Frog system. After reading around here a bit, it seems people don't care for the Spa Frog. My question is: why is that? Is it just because it's expensive? So far it's maintained a really high bromine level, I think because the spa people put it on the highest setting and told me to keep it there. I'm going to turn it down a little and see what happens. I'm using test strips until my Taylor kit comes, so it's hard to say for sure, but it looks like it does do a more than adequate job of keeping the tub stocked with bromine.
Also, what does the mineral cartridge do? Spa Frog claims that using it means you don't have to dump chlorine in after every bath. Does the mineral cartridge just oxidize the bromine?