20 gal should do fine.....also i have a caresheet if you clear some of your pms ill send one...I just wanna make sure, cuz crickets need a bigger container(24X16X16 more or less) based on articles online. Cant find any specific for dubias. Anyone can tell me what size is needed to start a colony?
Yes, you can tell even when they are nymphs, but not using the wings. The terminal segment on the abdomen is twice as wide in females. There are photos in another thread.^^ He only sells sub-adults, can you determine a m from f already?
And how long before nymphs turn into adults?