i thought they could be kept in both trop and cold water? well obv they can because alot of people do keep em in tropwater for long periods of time without splitting. as far i read up on them i was made to beleive they attatch to the LR, empty shells etc etc.. everywhere i read said they attatch themself, didnt read anywhere that said they split when stressed... i aint saying its not true but if the guys selling them and buying them manage to keep em in trop water without splitting/stressing them then im sure its fine. most fish/inverts are hardy as hell..i have kept a few species of trop water fish in cold water for many years and cold water fish in trop water.. both worked well for me, never lost any or had any disease, colour loss etc etc... even had some breed so thats a sure sign they are 100% happy. il get some beadlet anemones..if they split or show signs of being stressed il drop the temp. i have no fish in there yet so lowering the temp wont be a problem. the only prob would be what fish can i keep in lower temps. i know damsels can handle lower temps but i dont really like them