Welcome to CMAS

The Chicago Marine Aquarium Society (CMAS) is dedicated to providing the reefkeeping hobbyists with the richest community from which to share ideas and learnings and monthly meetings and twice yearly frag swaps to get you the goods.

CMAS Frag Swap - April 25th 2015 - Featuring Marc Levenson!
Come to our frag swap for frags, vendor & member booths April 25th at 11am at the Odeum Expo Center in Villa Park.  Well known reefing expert Marc Levenson will be presenting "What to do when an emergency strikes"
Click here for more details

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CMAS is proud to be a member of the Marine Aquarium Society of North America.