hi I have a 27gallon tank that's approx. 129 litres I think. At the moment it is home to 4white cloud minnows, 3danios and 2 platys. I currently don't have a heater having been told by the lfs that platy were temperate fish. Would all these fish be ok if I put a heater in, as I have seen been told that Platys require warm temperatures to florish. The tank they are in seems to be just above room temperature so lukewarm and everyone seems happy and content. Any advice. I don't tend to stock any more fish in this tank as I want them to live out there livespan (menaing I wont replace once they have died with newer fish) I am going to focus on OWNING only fancy goldfish in the future. I have a separate 42 gallon goldie tank. But I would like to keep these guys happy whislt they are under my care and let them have a good life. I like to understock generally so they have loads of swimming space. currents states are PH 7.5, nitrate 20 nitrite 0. They are all in good health no signs of sickness and due a waterchange today.
Emma
Emma