Who eats ricordea and zoo's

[muck]

I'd guess the snails you have to be Collonista Snails. Harmless algae grazers that many reef aquarists will get as hitchhikers at some point.

http://www.xtalworld.com/Aquarium/hitchfaq.htm

[howdy20012002]

this might be a bit off topic but what it the environment like in your tank with 7 tangs and 21 fish in total in a 90 gallon?
I am not trying to be a smart @ss either....but basically you are doing what lots of people say you shouldn't do and I just want to see what the behaviour of the fish is like? are they aggressive to each other? is there one dominant fish that bullies everyone else? do the fish appear to be stressed out?
I have lots of customers who ask how many they can put in their tank and what it the minimum tank size, so yea...just looking for some input.
thanks
Neal

[Diana]

Your right that is a lot of fish for a 90 gallon... I have 1 yellow tang, 1 hippo tang, 1 bellus angel, 1 brazillian gramma, 2 clowns, 2 bengaii, 1 anthias, and 1 mandarian goby, and I think my tank is already way overstocked. Not saying that your fish are picking on your corals, but having such a high bioload and thus a lot of organic waste cannot be good for the corals... I am even having some problems with one of my zoo colonies closing up and dying, while zoos near it (but not next to it) are fine.

I'm thinking some sort of hitchhiker crab is the culprit...