My colony is smaller than my OHs, for sure. However they dont really swarm like that for me, I am not sure why. I feed both colonies twice a week usually and soak their cages (with light misting when feeding from them)
The hissers I only have to feed 1 time per week, with the dry food, and wet I pull out on the next feed and dont replace. They just dont eat?? I give them a bunch of oak leaf litter though, and they do eat that, they eat a lot of it, I have to replace the leaf litter once every couple weeks, with a few handfuls of crushed dried leaves. Do you give your Halloweens leaf litter? I have been told, that is the majority of their wild diet.
Now that I know the wings thing with the OHs, I have about 12 adult OHs, and about 50 adult hissers. I have a metric ton of baby OHs though, and while I have a lot of baby hissers, they grow very slowly.
The tanks are heated on the back sides (pics are the front) front is open to light ATM, might put a cupboard door though been debating it (More so to protect the floor level glass, already had one get broken

) In the back, there is a large cork flat, that sits on the back wall, 2-3 inches from the wall on the bottom, and touching the glass on top. Its the hottest spot, and most humid as I have moss and a large pile of litter back there. Thats where the adults pretty much always stay, with the exception of a couple being out and about all day.