White Substance on Substrate Near Diffuser
So I've been running a pressurized setup for about 2 weeks now. I noticed yesterday that this odd white substance is starting to coat my eco-complete right in front of the co2 diffuser. I attached a photo, even though it might be hard to see exactly what I'm talking about (try to resist making fun of my pathetic Madagascar lace
Anybody know what this is or whether I should be concerned? I know in DIY setups you often get some buildup from yeast related byproducts but I can't find any of this in pressurized systems.
Thanks for the help,