This stuff is originating in some of my water trays. I use distilled water and the effected pots are under a fluorescent light. Water typically sits in some of the trays for long periods because I don't want to soil to dry out.
I can't take a pic because it's clear and I can't get a clear shot of it, but in the water trays it looks like a squishy shapeless version of the top of your typical jellyfish, and behaves like mucus (when I pick up a pot, it often "hangs" like a strand of mucus). This "mucus" slime fungus is thicker than water but thinner than Jell-O. It also clings to the outside of the lower portion of the pot that's submerged in water.
It has no color whatsoever. When I say clear, I mean clear.
I'm pretty sure it's infested at least the inside bottom portion of several pots.
I was going to use Green Light Organic Neem II into the water trays and into the soil to try to combat it.
Any feedback or if anyone knows what the stuff is by the description I gave, it would be greatly appreciated.