I won't use anything but IO... worked for me for 4 years, and never a problem. I don't even test anymore, I let my corals tell me when it's time for a water change. I even stopped kalk, and my corals grow just as well as ever.
The bucket for a few frags would be great, but you'd have to come here to see the frags. I have a ton of xenia, and lots of different zoos I might be able to give a few polyps of. I'll be breaking the tank down in a few weeks (to move it 5 feet) and I'm sure there'll be lots of OOPS frags.