Over the weekend, I purchased my first emerald crab.  In the same trip, I purchased two more cerith snails and one more nassarius snail, bringing the totals to five cerith and three nassarius snails.  Unfortunately, I found the emerald crab lifeless on the tank bottom yesterday, with a nassarius snail completely covering the carcass.  I decided to try again and went out and picked up two emerald crabs today.

I’m trying to combat a bubble and hair algae problem that was introduced to my tank after buying a mushroom-covered rock from a local fish store.  I’ll be measuring two things in the next few weeks:  (1) Emerald crabs’ effectiveness in removing bubble algae, and (2) Emerald crabs’ compatibility in a reef tank atmosphere.