looking great man! do they have a little stretch?
and yep your rice hulls should work fine, hopefully those pesky bastards will be gone soon!
i have been watching this thread added below about the benefits of malted barley. i bought some but am waiting for my next run to give it a try. some folks on there use it as a top dressing as well as a tea and from what they say it would provide more benefits for your plants than the rice and prolly do the same job against gnats. just something else to consider down the road.
good luck, i’m looking forward to your updates and i promise I wont preach about gravel beds for gnats anymore…