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Blue Leg Crabs Good For Reef Tank?
I have a 90 Gal tank with about 15-20 Caribbean Blue legs crabs, all small about 1/4"- 1/2" wide shells. At first I thought they where great scavengers, cleaning up all the left overs and hopefully any hair Algae. Lately I am not so sure, they don't seem to eat any algae and they are always plucking on my rocks. I am now wondering if they are eating everything that is alive on the rocks including potential coral growths. Do the negatives of keeping these guys outway any benefits?
Need some advice on this.
Thanks
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