Sizing a tank heater or heaters is based on the water volume of the tank the average temperature in the room where the tank is located and the desired water temperature for the tank.
Aquarium heater for 2 gallon tank.
For the heater wattage the basic rule of thumb is to use between 2 5 and 5 watts per gallon of actual water volume in the aquarium.
Want your water hotter or colder to suit your specific fish.
Most importantly it s the smallest adjustable heater on the market.
It depends much on the size of the tank.
The hydor theo is an adjustable aquarium heater.
Best small aquarium heater for 2 6 to 5 gallon tanks.
Or maybe you want to turn the heater down during summer.
A 25 watt heater for a 2 5 gallon tank.
A 50 watt heater for a 5 10 gallon tank.
3 6 out of 5 stars 227 ratings based on 227 reviews current price 17 99 17.
Zeetoon 25w aquarium heater automatic thermostat betta fish tank heaters tortoise small water warmer for 2 5 gallon container with 1 stick on thermometer strip 4 1 out of 5 stars 98 11 88 11.
Product title tetra submersible aquarium tank heater 2 15 gallon 50 watt average rating.
The better the heater can run the more ideal the tank will be for fishes to live inside.