Thanks Sweatervest
There are not many pics out there of Foraminiferans in aquariums. However, the available aquarium pics that claim to have Foraminiferans are the closest resemblance to the grey fuzz I had. Moreover, the fact that they feed on bacteria fits the observations too. Yeah, that's a possibility.
Here's a link to Hitchhiker's Guide that could help ppl out. Foraminiferans is also in there.
http://www.lionfishlair.com/hitchhik...hikerswf.shtml