Delurk...
A friend of mine has a reef tank and is very well acquainted with the owner of the best LFS in town. The LFS owner recently got a shipment of this magnetic tube that tank water flows through and has gotten terrific results with it. I'm not sure how it works, but it definitely has helped speed up the healing process in her hospital tank. The supplier of said magnetic tubes asked her to do an experiment with it & had her promise not to do any water changes on that tank. There is a tang in there that got a good chunk bitten out of it, and should've died, but a month later, you can't even tell where he got bit. :o The LFS owner said that the tank water is in great shape and hasn't needed to do a water change in months.
If anyone is interested in brand name, what it's called, etc., I can ask my friend.
Shannen