I agreed the temp needs to be 95 to 100, they need at least 3 or 4 eggs crates, more if you have lots of roaches. I use an under tank heater and a heat emitter above mine. Mine are in a 100 gal glass aquarium.
I will write up my recipe for frozen gutload. It is easy, I make a month's worth at a time and my roaches are very juicy and well gutloaded.
Gutload directions put everything listed throughout a food processor, mix it all together, add water so it is a mush, not dry, and put in some bee pollen Put it in ice cube trays and freeze, use as needed.
sweet potato peeled
oranges
canalope peeled
squash most any kind peeled
carrots
apples
green beans - fresh
as many kinds of greens as you can get include
collard greens
mustard greens
turnip greens
kale
beet greens
dandelion greens
my roaches eat 4 or 5 cubes a day
hope this helps.