I've read a ton on ich and the effects on fish, treatments, etc... But in my reading, one thing was never fully clarified: can ich effect or attack inverts and live rock? I know copper treatments and salinity drops to rid ich can kill the inverts and rock, but if you leave a tank fish-less for 8 weeks to rid the parasite, won't it just lay around on the crabs, snails, and life on rocks?