How big are the emerald crabs that you have?

I have found from experience that you need large ones to go after the bubble algae. The smaller ones (under 2 inches) don't seem to care for the bubble algae. I recently put in an emerald crab that was almost three inches (I had also tried the smaller sones and they too did not seem interested in the bubble algae) and he has nearly cleaned out my entire bubble algae population from my 135 gallon tank. I literally had close to a thousand individual bubbles (of at least four, if not five, different species of bubble algae) and now you really have to look to find any after just one month. A big thank you goes out to Jade for letting me know about the size of the crab issue.

Just ask CD or ~pete~ as they both have seen the before and the after and both were amazed at the difference in my tank.

HTH