Number of Emerald Crabs

[-Logzor]

I've never really kept a CUC but recently I added three emerald crabs. I have some bubble algae and some other stubborn algae that I want to get rid of. I see them working away and cleaning, if I can find them.

How many more should I add? Tank is 150g SPS dominated.

 

[Rob.D]

I think 5 or 6 would be ok, I really don't think you can have too many, so long as there is enough food.

 

[AdamNC]

I've been told 1 per 20 gallons is good.