Mithrax, reef safe?
I noticed that the Mithrax Crab will eat bubble algae. Are they safe for a reef tank and how many is necessary for a 90 gal tank with 90 lb. of live rock?Thanks………Lin Smith < Of all crabs, this genus is amongst the best for reef use, though not totally "safe" (they can eat coralline/red algae, might try your other animals if hungry), but do often consume Valonia/bubble/pearl algae as well. I'd only use a couple...