Thanks for the info.. I'll start rinsing my carbon.

I think I'm going to give my YellowTang a fresh water bath.
He's hard to catch!!!
Would a cleaner shrimp or wrasse do the job?

Ok, so after half an hour of chasing my Yellow Tang and destroying my aquascape :cry: I gave my yellow tang a 6m freshwater bath to get rid of the black spots... and apparently they're gone. He's stressed and hiding :sad: And I hope he survives to this bad experience of swimming in freshwater.

I don't want to stress him more so I'll re-aquascape the tank tomorrow, I'm afraid to lose him :cry:

I also found my Candy Cane Pistol shrimp! I thought he died or something... Now he shares the same rock with my Yasha Goby but not the same entrance :twised: