Use something smaller as the bottom bucket, so that there is a good inch or so gap between the two. Does that make sense? Yeah too much dry feed, not enough water. Your container size looks big for what they would eat. I think it would take them a good 3 days full grown to eat that amount.
I should try garlic in mine... Does it make it smell garlicy?
I personally love the smell or garlic but no its not too strong XD. And yeah Ill probably use a smaller container for now and use something bigger when their older XD