I've been noticing this for the past month. There's this white growth on the inside surface of my aquarium. Do I have to be clean about the explanation of it? If so, it's attached to the glass and has a tail extending from it....
Is it sort of like a jelly goo? I've had it on occasion but it disappears with the addition of a suckermouth algae eater. I don't know if they eat it or just knock it off. You can wipe it down with a magfloat, too.
Get a good look to be sure it's not hydra--you should be able to see tentacles with the naked eye. They are cute in a tiny way, but if you get too many they will affect the look of things.
And there does seem to be something growing off the wood. Maybe once that settles in the other goop will die back too. How long has it been set up?