Ideal conditions are pretty easy to meet but they are specific for a colony to thrive. Temps, between 88-92 is perfect breeding temps without too much mold growth and overheating issues etc. 95 is the limit to how high you want and if you go below 78 breeding slows to almost nil. Space, space, space. To have a thriving colony it's so important to utilize your space intelligently and provide them with more than most people recommend. The colony will grow at a faster rate, and be a healthier community in general, very little wing biting, and such. And food, the food sources are incredibly important. High protein is needed for a thriving colony. 18%-20% is all you want but it has to be ALL vegetation based. Dry chow and then all water sources can be from fruit and greens/veggies. A rotating diet and a lot of variety is needed for a roach colony to provide it's optimum nutrition to your reptiles. Don't avoid certain veggies just because of low calcium levels or calcium binding properties just feed a large variety and never too much of anything ever in my opinion. I have a lot of things at my disposal though. Lot's of ventilation.... other than that keep stress low in the coloy in the beginning especially. And cleaner crews make your life easier by far.