That's really close to what I use for most of my collection.
I prefer carrots w/the mealworm colony. (like you said, mold..) But citrus fruits for my roaches as a staple. And I toss in other random veggies, I happen to bring in for myself from time to time. (bellpepper, cucumber, squash) I've found that cutting across the wedges, and putting it rind down in their dishes. Inhibits mold and increases access. The citrus seem to hold their moisture longer that other sources, I've tried.
I've tried different forms of H2O crystals. Both commercial and home made. (Agar agar) But never liked any thus far, so I don't use them. My reasoning is it's not natural to their native environment. And an added expense, better spent elsewhere.
I also currently use the same dry regimen. I've been toying with the idea of trying out Lab diet rodent pellets on a test colony. Since I already use them for my feeder rodents.
I only recently started carrots for the mealworms. Wish I'd thought of that one sooner. Glad to hear 'bout the air flow too.
Thanx for the info., much appreciated. 