brand new tectus turbo snail died.

I got 2 turbo snails this past Saturday, the one who died is very large. My parameters are perfect. He was high up on the glass lastnight now he has been in the same spot all day... Notmoving or anything theothersnailiscuising around having a feast...I don'tget it.. I acclimatised them the way I do any other invert. Could he have been old? Lol I don't know why else he could die.
One emerald crab
Two small hermit crabs
One ocellaris clown
One skunk cleaner shrimp
One tectus turbo

 

they often expire Nano Mano
not always easy to ID root causes with CUC members
temperatures in home reef aquaria are often considered to be one of the reasons they do not always survive as long as we would hope

are you sure it is dead
it is also not uncommon for a snail to stay in one place for long periods

this will seem obvious, but if its attached to the glass side of the tank, then it is still alive
if it has fallen on and it laying sideways on the sand bed or rocks, then it is probably to late for it

snails often lose their grip and fall over , the larger the snail, the heavier the shell it has to carry and this makes it difficult for them to flip back over and right themselves
this combined with the fact that fish, and crabs etc, take advantage of them in this flesh expossed situation could be one reason it passed away

if it is the right way up but still
try to gently lift it , if it comes away easily then it is probably a goner
but if it seems to still be stuck to the surface it is on, then it's very much alive

Steve