Hey guys. I am starting a new 20g tank. I was planning on putting 5x kuhli loaches, 2x Black Skirt Tetra (I know you are supposed to have at least 5 in a group, but I got these when I first started the hobby about 2 years ago), and either 3x gardneri killifish (one male and two females) or 2-3x German Blue Rams. Which fish should I choose? BTW I'm doing ti heavily planted with water wisteria and Amazon Swords. Thanks!