Powder blue rubbing against rock and sand

[GavinRad]

I understand many post this and find out it’s ich. But my blue powder tang just got introduced to a kole & bristle tooth tang and They didn’t get along for an hour or two but are just getting used to each other now. They can eat together and chill in the same spot sometimes.
But the powder blue all of a sudden began to rub herself here and there when she gets near them. She was very annoyed that they were in there at first so I figured that might be the reason ?

 

[blaxsun]

Was the tang quarantined beforehand?

 

[DaddyFish]

PBTs will sometimes exhibit flashing behavior for a few hours when tank conditions are changed. If it continues tomorrow then you most likely have parasites.

 

[Lbrdsoxfan]

As said above, watch closely over the next week. I introduced a PBT (brown) about 3 months ago into my 120g, almost instant ich with parameter changes. It came from a fellow reefers tank as the PBT outgrew it (60g). Fellow reefer ran a ich management tank as do I, so I know the risk already. I put him in and within a week he had a few spots and still does, eats like a pig and is somewhat tolerable to his tank mates.

 

[GavinRad]

Thank you guys, I will monitor her and treat with something if I notice it.

 

[GavinRad]

Update by the way, she hasn't done it since the introduction to the new tangs. Probably was just annoyed.