Snails Dying

I had 4 turbo snails die on me in the last week and a half.:-/ I have read in places that turbos cant do well in high temperature tanks and was wondering if that was the reason? Temp is 78F. My tank has been fallow for 6 weeks due to ich. They have been in there for over 4 months and were doing fine so I thought. All of my other CUC seem to be ok. Could they have starved due to too much clean up crew and no fish in the tank? The rest of my CUC ate their remains. Any Ideas?
Thanks

 

I also had a similar experience with turbos. I think maybe my scarlet hermit killed them for their shells, but it's hard to say though. He could have just been cleaning up the mess. Do you have any large hermits in the tank?

 

yeah dude, as John says, big snails have to eat alot everyday little snails dont. get alot of little snails. reefcleaners.org

 

I have 4 hermits but do not consider them large. The turbo shells would be way to big for them but they probably wouldn't know that...

 

I did make a purchase from reefcleaners.org already.
I have nassarius ,trochus, astrea, ceriths, and nerites along with some crabs and shrimp.
Just wanted to make sure nothings off with my tank.