u/Bussingod

Continuing from my last post, I now only have 1 mantid (I gave 1 to a local reptile/insect pet store and am giving another away to a very nice man) but I am wondering if my enclosure is ok for my baby mantoid Vivian. I added mesh to the top of the cage and a hydro ball layer under the soil for drainage as well as charcoal and springtails.
I make sure the soil stays moist and spray the whole terrarium down with spring water 2x a day.
This is only temporary until she gets too big for the tank then I will be upgrading to a 10x10x15 for her.
And comments or advice? Should I add isopods or is the tank too small for them?

I got free mantids from Ace Hardware like 2 days ago and kept 3 of them, is this a good tank setup? I think they might be Chinese mantids but not sure. I put flightless fruit flies in their enclosure but they don’t seem to be eating and I am worried. I only plan to keep 1 but have 3 because I wanted backups in case 1 or 2 die. They haven’t started fighting or cannibalising each other yet but idk how long I have. And right now their tank is 4x4x8 inches but when they get bigger the winner’s (as in the one I keep NOT the winner of the baby mantis hunger games, English is so hard you guys) tank will be 8x8x12 probably. Please give me any and all advice.
Edit: I ended up choosing the 2 who ate the most flies and separated them because I feel like they each have a bigger chance to make it to adulthood.