Get yourself some freshwater shrimp my man
Ive never ordered from this company, I'm just using the link so you can see what I'm talking about: https://aquahuna.com/collections/freshwater-shrimps
Ooo, good idea. I love those little guys.
If you're planning on getting an actual tank foe fish/frogs, you can turn this small one into a Daphnia tank, so you can get some free food for your frogs!
Some duckweed, a couple plants, and a snail or two, and you've got a simple lively aquarium.
Cool thing about Daphnia is that besides temperature, it's nearly impossible to kill them all, the population will always bounce back, which makes them really easy to takencare of.
That sounds fun, too.
Size wise, I'd say shrimp or snails. But even then you may struggle to keep stable parameters in it. Maybe just have aquatic plants in it?
Hmmm... I've been eyeing a microscope lately, too. That could make for a good combination.
A community for aquarists, both fresh and salt!