Check out the algae on the rock, if I was a mithrax / emerald I would sit there!
Yep. Bubble Algae is all over. Probably should add another Emerald. Like many, I have mixed feelings on crabs. Getting a little hair algae in two spots as well. Been feeding a little more lately, so not surprised. Algae is always there. I am learning to live with it. Never a reason to panic.