207lauras-DO NOT put the gardneri in there with those fish. They're are nasty, aggressive things. I used to manage the fish section of a Petco, and we put them in a tank with some tetras, and the damn things tried to eat them, even the ones that were too big. I had to pull a half-eaten lemon tetra out of one's mouth. Next time you're at the pet store, look at the size of their mouths..they're quite large. Your danios, glofish, and DEFINITELY pygmy cories would all be at risk of being eaten.
5.5 gallon low-light planted tank
-breeding colony of Heterandria formosa.
for reference: my name is Julie