Try wetwebmedia. Bob Fenner was the one who talked me into it, after coming by and looking at my tank.
Pros: The water is crystal clear. I mean GIN clear.
Cons: The units are pretty much all carp. If you do a search, you will see that the average life expectancy is about 12-18 months. So, buy a cheap one
They are brutal on your plastic equipment. However, my acrylic Ace-built skimmer seems to have handled it fine. You DO need a skimmer or other device to react it to your water.
You HAVE to have an ORP controller. Not just a probe, you need to be able to shut it off. Either that, or undersize your unit to be safe. It is toxic if the concentration gets too high.
Bill
215g FOWLR... and anemones, GSP, gorgonians... carp, that isn't FO!
"I killed my first SW Fish in 1971..."