I have the exact same thing in my nano.....along with some caulerpa mexicana.....and Caulerpa taxicotes.....something like that...anyhoo, its totally thriving.....it looks like green worms jutting out from a single peice of rock....awesome type of caulerpa IMO. As for the turbo snails.....why do you keep them? they're okay but if they topple over and you're not there...60/40 chance that they won't get back up and flip over, that just means that they will die....use something else....some sort of sand sifting snails....they have an extra sniffing appendage that will help flip them over if they were to ever fall from some where...(observations that I've seen) Good Luck!