If you want to breed dubias you should use a small tank or rubbermaid container. It will take a lot more to keep it heated to 100 degrees and have a humidity of 60%. They also do better with less space and it's easier to maintain. I keep a couple hundred females in each plastic totes or small 10 gallon tanks with heating pads under them. A ratio of 3 females for every male is a good start. The females are live bearers, you will get about 30 nymphs a month from each adult female. I just sorted out one of my colonies and now have approx 5000+ babies, and they will all go into another bin. It's amazing how many fit in a rubbermaid tote. It's a lot of work if you plan on making money from them. I started breeding them to feed my beardies a few years ago. It is nice to always have feeders and not have to buy them. I also make a few hundred bucks a month selling them. My hisser colony just started to explode too, but I found it harder than I thought to sell them.