Alex, Joshua made a good point a few posts back about a bad batch of IO on the market. Are you still using salt from the same bucket to mix new water or is that all gone now? I thought all that bad stuff was gone, but, if you still have issues, I can check it before you use more.

Also, on your wilting softies, move things like that florescent green spag. leather to near the bottom. Softies, other than reef crest things like a yellow figi leather, don't need so much light. See if that helps them some. And, gotta give them from 2 to 8 weeks to recover from that calcium/alk fall out. Snails fall sometimes. Thats the life of a snail. There are times they clean the inside of their shells and loose their footing as well.