I just got done raising baby jacksons my self…
I used a medium size exo tarra cage. They have a little vent strip in the front great for letting a little fresh air in.
They are fine to house together for 3 months. They will start to get territorial, the males especially. They will start to get bright green and twitch their heads or bodies back and forth, showing signs of dominance. This is when I separated mine (real close to 3 and a half 4 months).
If you are going to keep using the glass aquarium I would try to get fresh air in it a few times a day. If you don’t they will have a great chance of getting respiratory infections, from the stale air… I cleaned my cage every day (just soke up water and clean poo) helps with the stale air. I have also read if you just separate the smaller chams from the bigger chams they will do better.
Also, you are going to want to make sure the environment stays in the low 80’s, and that they are drinking. (Keep in mind; it is very easy for a baby cham to drown.)Most everything I read said to mist 3 times a day, I always misted more than that, simply because I had to too keep humidity up there, and because they drank every time I misted.
The bigger fruit flies that they are talking about are D. Hydei i do believe.
Hopefully this info will help you out, there is a lot of info out there you just have to take the best of it and compile it to make the best home for your buddies.
If you have any questions feel free to pm me
Keep in mind jackson have a 20% success rate in the wild. I had 50% success, but i do know of people that have had success in the 90%
Good luck