So quick question is a 150g big enough to host 2 mandarins? I think they are beautiful fish and want a red one and the regular green one but not sure if my tank is big enough if anyone can help me out Thanks
It's not directly related to the size of the tank, but to food. Mandarins usually won't eat prepared (even frozen) foods, so they need a large, mature sandbed full of critters for them to eat or they slowly starve to death. That's why Nandez is asking about maturity of your setup.