I'm just starting up with hydroponics and have a flood tray and seed tray with a dome cover. I'm using something called "Sure to Grow" as a substrate. I thought I would start with something simple like growing microgreens. After about 5 days, everything is going well (all seeds sprouted) but this morning I noticed a fine white fuzz on all (and only on) the red chard shoots.
Is this mold? I should say that I did not vent the dome until today. I flood the tray only once for a minute each day.
Thanks
Fred