Discus Don

I've stepped up water changes, along with zapping it with excel I think I'm winning in the long run

Everything has been taken out (except substrate) and soaked in hydrogen peroxide. I can kill it, but like all fungus when it gets stressed it sends out spores.

I tried a fish fungus cure. Didn't phase it. It doesn't seem to harm fish or plants. I think it's either just hope it runs its course. Or take the whole tank down and start over.

Shot it with some excel in a syringe. All that did was put it in the spore stage.

It shows up, grows for a few days, disappears and pops up some where else. It had to come in on a live plant

It's not biofilm. This tank has been running for over a year. This stuff kinda looks like 2 dimensional cauliflower. It grows in a spot. Dies off

I have what appears to be an off white fungus growing on glass, substrate and wood. Any idea what it is and more importantly how to get rid of it.