Hello and welcome to the forum. What a coincidence , I am also preparing a biotope everglades . Also my aquarium is small but there are interesting species.
Heterandria formosa Elassoma evergladei golden topminnow Fundulus chrysotus and many others.
Plants also there is a good variety . I put here the link to the post where I talk about this aquarium , besides the part of search information. To me I caught my attention the Big Cypress reservation, but all everglades there are interesting sites. The post is in Spanish , but the links are in English.
Thanks! My Spanish is very bad, but I will make do. My water here in Virginia is acidic, so I'm hoping I might be able to keep a small Everglades biotope if I can find some small fish and plants. I will be researching.
Everglade's biotpe aquarium may be quite easy to represent if you are in the area. If you want to initiate with a small aquarium, maybe 5 to 10 gals. you can use some sand soil for the bottom and some local plants, include small ghost shrimps, some snails and for fish some of the mentioned by Pezerologo and maybe a couple of Lucania goodei, Heterandria will always be a good shot and you'll have a good population in a short term. Avoid specialy to introduce any ciclid as the will eat all the other small fish and will grow fast.
If you have something on mind, just let us know by posting in projects section here and we will guide you as much as we can.