It took some convincing, but my wife decided we could go on reefing (the clowns were the reason she wanted a SW tank in the first place).
Off to Ocean Wonders to confess to the owner that we had killed the clowns within a month of getting them. But we were ready to fight back! Making our tank a safe-haven for future clowns. We found the magical product:

and began the treatment just before I left for another 3 month trip around the Atlantic