[Wet Thumb Forum]-white stuff on surface of water

[Ben C]

Hey,

This is the first time in almost 10 years of having aquaria that i have seen this problem. The surface of the water is white. O2 bubbles aren't escaping the surface and now it appears that the gunk on the suface is going mouldy. I have no idea what it is.
To start with i thought it was plant debris/tissue, but there are no plants that could be producing this.

what on earth could it be, and how should i go about dealing with it. Admittedly, surface agitation is almost nil, but i'd like to know the cause of this stuff, and attack that.

thanks for any help,

BEN