Do you have any pictures to share to see the setup? I'm curious how you keep the trays separated - the growing tray obviously must not sit directly into the water tray, so how do you keep the growing tray suspended an appropriate height above the "gravel" (which I assume to mean just a watering tray without gravel )??
Thank you! Really need to find a solution to excessive mold I get. All the recommendations haven't work - best seed I can get, air circulation ... nothing. Still lots of mold!