[Wolfgang]

I have never heard you shouldn't mix coral types...... Sure softies throw out a lot of chemicals if they get pissed off but all you do is fun some activated carbon and that will solve that issue. You shouldn't put anything close to LPS with long sweeper tentacles that come out to feed at night. A good 6" bubble around things like thatis a good idea. SPS for the most part will tolerate each other ive never had an issue with that. Zoanthids are a seamat and will fill in wherever they can assuming other corals dont zap them away. The only thing i would be wary of is anemones. They have a tendancy to move about the tank looking for their perfect home and if they contact a colony of any coral the nem will kill it.