They NEED- I repeat- NEED a sponge filter. I mean, true, these little babies have literally no bioload and are very small, but, they are very sensitive to ammonia and nitrate. So better safe them sorry! I also recommend a heater.
I've had ghost shrimp in my main tanks before with the bettas. Had being the keyword there. xD; I do like them quite a lot it's just... they never seem to last long before they turn into snacks. A few days of peace.. then someone realize they can chase them. And then everyone is gone. xDDDD
Also I get my marimos from petsmart. $8 a pop but they sell them in their own little cups, just like the bettas-- and it's nice not to worry about them carrying anything bad into my tank from it.
I keep my nail polish in one of my old quarantine tanks, and I use a fishbowl to carry water from the sink to the tanks. More practical uses, I know, buuut I haven't been feeling too creative as of late. Lol
Well obviously I don't keep my room at 55, so what about the low 70s? The reason I ask is because I know moss balls like cooler water, which would be the main reason I would want to set up a tank. And what species are we talking? There are some shrimp that live in the arctic ocean, so I am guessing there is going to be a huge range in tolerable temps.