two things i need help with

ok so i bought a pet co powerhead thw other day and when i put it in the tank it looks like its snowing so i need to know how to fix that and also ever since i put it in there my clwnfish and my yellow tailed damsel have stayed in one spot for like 2 days does anyone know why plz help im starting to get worryed helpppppppppp

is it blowing sand around? try aiming the output nozzle towards the surface. is it sucking sand into the input? how big is your tank and what is the gph rating if your powerdhead.

or it could be to close to the top sucking in air making air bubbles

thats the same thing I thought about, or else, If you have the one with the airhose sticking out the water, just remove it.

The "snow" is just air from the air tubing. Just take it out, it's ugly anyway.

Yep, sounds like you have the air tubing attached, which is not meant for saltwater.