White growth on pumps

[GermanNuts]

Need a little help identifying a growth that is expanding on my circulation pumps. Any help is appreciated.

http://www.getdropbox.com/gallery/70734/2/FishTank/Growth_ID?h=c81e21

The pictures show what it looks like after about 2 weeks. I have been unable to find anything about it through searching.

Thanks in advance.

 

[GermanNuts]

No takers?

No takers?

No one has any idea?

It looks like coconut shavings.