One thing that's weird or interesting is I have a nano tank for just zoa's and things 4 my son the nano was started with water and rock from my tank that has had this outbreak (prior to outbreak when his tank was started) any way I was down to the last 2 snails I had in main tank they were slowing way down and the other day I noticed they were on there back dieing basically wouldn't even pull into shell if you touched em no movement at all seemed lifeless so to see what happenes I just tossed em into nano ! Two days later (tonight) they r all over moving all happy like and eating like I Havnt seen snails do in months in my tank!! they could barely pull there shell around slow and I mean slow lol I have been battling with this stuff for maybe 6 months now the snails make my think that it's Dino's even more, amongst other things 2 though! but it could not be 2 also... Thanks in advance 4 any advise