I use oats and bug buffet as my base. I then feed them carrots, apples, kale, potatoes you get the idea. No lid so it drys out. I have had this last batch of supers about 8 months.
The only way I could set it up to have NO water outside the cage was cover both sides and back with plastic (I use panda plastic) spray nozzles towards the back and sides (I use 3 nozzles) and use a drip pan (I got mine from 3L) Lean it all the one back corner with a drain. Now I can run my...
I think most don't do this because some or most bugs don't thrive with overdosed calcium. This is why we dust right before feeding. The only feeder I use a substrate for is supers and it's oat meal. Dubias, crickets, silks, horns are bare tubs.
500 silks can put the mulberry leaves down. I was having to feed 2-3 times a day with fresh leaves. Chow they grow a little slower but you only need to put food in every 2-3 days. So much less work. Hornworms you need a good size screen cage just to breed them. Silks you can breed in a shoe box...
Piggletts blog is a very good start https://www.chameleonforums.com/blogs/pigglett79/silk-worm-rearing-and-breeding/
But I could post how I'm doing if you need. I run a different setup from egg to about a month old and then move them to a setup just like piggletts. Then if you want to breed...
I started with eggs from mulberryfarms.Com and then ended up with way more eggs then I started with. They are right about 4 months in the fridge and im getting about 90% hatch rate. Going to hatch a bunch here soon to refresh on eggs.
Both I did fresh leaves but now for winter I have been using chow. The chow is a little slower growth but I don't need to feed them 3+ times a day like fresh leaves.