Hello all. I’m struggling to maintain the temperature in my tank with the current cold weather ( my first winter with the tank ). The ambient temperature in my house is 10c 50F and probably much lower at night. My tank is a 13.5g tank with a 50w Fluval heater in it. When the lights go on the tank is on average 23c or 73.4f. I’m aware this is the very low end of what’s safe and would appreciate some tips on how to maintain a stable temp. During the normal warmer months it stirs around 24.8c 76.4f. The coral in my tank seems to be doing ok however I’m not sure how much longer I can risk it. Should I but a new heater right away or is there anything else I could do ? I have a spare heater for heating new water however it was super cheap on Amazon and I don’t trust it not to boil the tank.
Thanks
Thanks



