I've given up on them for a while. I had a nice little collection of 5 clams ranging from 5 years to 2 years old that all died within a few months in 2010. Pyramidal snails... In 2011 once the snails disappeared I tried again, one after another over the course of a year I bought a squamosa (from a local's tank), derasa and Tahiti maxima. The derasa and the maxima died after about a year, and the squamosa lived for 3. I have not seen any of those snails since 2010... but something still isn't right. Meanwhile I've got other non-coral inverts (urchin, cucumber, abalone) that are pushing 7 years old. So I'm stumped.
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