I used about the same size container for my single colony of discoids. Whenever my bin started to overcrowd, once or twice a year, I'd freeze off about half the adults and a good bunch of nymphs. These frozen roaches were then used to mix into premade meals for tegus, tortoises, turtles and the rest were tossed to the chickens. I used water crystals for the first year or two but ended up dropping the watering system completely. Instead I just made sure there was always some fresh fruit available - citrus works well for this and was my personal staple - and my colony did fine. If anything their production increased as a result.