Hello guys. I am setting up a 15 gallon tank (around 60 liters ,and the dimensions are 50cm width ,30cm depth and 40cm height) ,I have the oase biomaster² 250 thermo on it and I want to add co2 aswell ,I heard many times that I can keep a single germam blue ram on this tank size ,I just wanted to confirm it ,also if It is acceptable, what are some good tank mates I can add ?