Bubble algae

[DD Corals]

I need some advice. I came back from college, and my tank is covered in bubble algae. I have one emerald crab but doesn't seem to be doing much and a week later it all came back after I removed like 90% of it. Do I buy some more emerald crabs or do I do something else? I have a 40 gallon fishtank and don't plan on adding any fish like a foxface.

Also yes I know I need to move the Acropora just not home right now and I had someone take a picture of the tank for me. It fell down from the rock it was on.

 

[blaxsun]

Here's the problem with emerald crabs: they do a bang-up job with bubble algae. Why is that a problem you say? They're tank snobs when it comes to the menu. If there's anything better to eat - they'll pass over the algae and eat that instead.

 

[EeyoreIsMySpiritAnimal]

Manual removal is by far the best first step. Then you need to address the imbalance that's feeding it ...