Any idea what this is?

[412Reef]

Hi there!

After I turn my pump back on after feeding flakes of some sort of white particles fly around the tank. It almost looks like white fish flake food, but I feed pellets and shrimp. I have filter socks, and a skimmer, but it still gets all over the tank and the fish try to eat it, sorry for the poor quality photos.

 

[Teddy99]

It is difficult to see. I once shredded a bit of a sponge growing on my pump, when I turned it back on and it looked like small white peaces flying around. Have you tried taking the pump out and have a look for any dirt or living critters settling at / before the pump ? Maybe someone with more reefing experience has other ideas what it may be.