Emerald Crabs fighting

[Bouncer]

I have two emerald crabs in my 12gal Nano Cube. I witnessed them fighting this morning. Is there enough space in a 12gal for two crabs or do I need to supplement feed them? My cleanup crew consists of; two emerald crabs, two scarlett hermit crabs, three banded trochus snails, two margarita snails and two astraea cone head snails, and one narssarius snail. The tank is pretty clean but I find that because the lights are on for 12hrs a day the algae continues to grow. Thoughts?

 

[Bouncer]

I will state that I recently added the second emerald. The first has been great, eating the bubble algae and keeping things tidy. The second does his job but has a tendency to spit stuff out and is kind of messy.

 

[Yaten13]

Just my own gut feeling but that seems like a lot of cuc for that size tank. I would probably suppliment their feeding a bit. Of course one of the crabs might just be a jerk and you might need to take one out.

 

[Bouncer]

I decided that after the Emerald Crab took a few swipes at my Black & White Ocellaris Clownfish I decided it had to go. He was a mean little bugger. I replaced it with a Scarlet Skunk Cleaner Shrimp who is super happy and checking out his new home.