I have algae eating crab's and when they shed their skins sort of speak, what kind of critters will eat this type of stuff if you can't remove it cause of all the live rock?
Don't worry about it if you can't get to it. The old shell left behind when a crab or shrimp molts will eventually break down and dissolve and/or be eaten by something. Won't do any harm to leave it in there...
I agree with Chris. There are many natural detrivores found in sand and live rock that will process this nutrient. Some clean-up critters like sea cucumbers and fighting conches can help mop up debris, but I found they aren't necessary for a healthy tank. Some starfish also are good detrivores, but the problem with most stars is they are very sensitive to water conditions and therefore aren't very hardy.
nothing to my knowledge will eat them(the molted exoskeletons) i guess you can pull them out..they usually seem to dissolve after time..i have seen my choco chip starfish eat the molted shell of my emerald crab..
Thanks for the welcome. I haven't noticed anyone eating the shells either, but they do get broken up. I usually leave them in there for a couple of days in case someone is eating it. By the time I remove them they're scattered around in pieces.