Your fish also requires heated water to swim in during winters.
The best way is to use a submersible water heater during the winter months.
This Aquarium Heater is submersible and comes with suction cups to attach to your aquarium with ease. It has an easy marking on the heater so you can keep a check on the water temperature. It is easy to use as well.
This is plugged in the same way as your filter and is essential for the well-being of your tank inhabitants.
What's in the box
1X 100W High Class Quality Aquarium Heater
