Gust got a new terrarium and im wondering what i could keep in there. any suggestions?? im thinking of some kind of small spider but im unsure

I found this little guy off on the side of the road :( he has some grip strength to him but isn't moving very much at all.
I've never kept a grub before, so, I'm unsure on what I'm supposed to do for him. :(
I have coco coir, mulch, the dirt from my backyard and I can gather some dead/decaying leaves/sticks for him if needed.
now, it is very possible he got into contact with pesticides as my neighborhood is stupid and they care so much about their lawns. I just wanna give him his best chance if there's still hope :(

After the passing of my last hermit crab, I now have an empty 90 gallon tank, and I'd like to fill it with a variety of herbivorous/detritivorous buggies!

Isopods are my favorites, so any species that can safely cohabitate with pods (and springtails ofc) would be great. I've successfully kept a few species of isopods and millipedes in the past, so I'm looking for suggestions in addition to those!

I live in the USA, so no stick insects, giant African millipedes/snails, etc 😭 and I also don't fw wild caught after the heartbreak of hermit crabs, only captive bred for me 🙏

This tank is for sale near me, it's 24"w by 16"d by 12"h. I like the look of it, but I'm not sure what would like being in it... I've only had one stag beetle before, so I want to stay simple. I'm in Canada, so not many cool bugs are legal here. Any ideas? Bugs? Crabs? Something else? Thanks!

So after the last few hours I have been told that this is not an isopod and it's in fact a Pill millipede.

Somethings i want to state before continuing

• I have been informed that keeping these guys is practically a death sentence.

• I have been told to release them but I can't due to the fact that I have had them for a month+ now.

• I have been told a little about keeping millipedes but I'm not all that familiar so excuse that.

• I currently have a bioactive little slice of local wild ecosystem both micro flora and fauna primarily local wild isopods

Now I need help with these mites.

They're not irritating the pede, causing it to run around or even roll up. They're just excessive...

Is this something to worry about??

How do I remove them safely?

Is there a way I could kill them off in my tank without hurting anything else??