white skirt tetra

Hi!, I have a fully cycled 20 gallon, in which I currently have 4 Glofish Tetras (one didn't survive the tank switch from 10-20 gallons) and I currently have a Dwarf Gourami and a Bristlenose Pleco in a 10 Gal quarantine tank. Ideally, I would like to have 6-7 Glo Tetras, the Dwarf Gourami...