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Results 1 to 6 of 6
  1. Default What Size Heater?

    0 Not allowed!
    Hi, I was wondering if I could use a 250w heater in a 80 litre tank? thanks.

  2. #2


    0 Not allowed!
    The size of heater will also depend on the temperature of the room and the desired temperature of the tank. Try this calculator to figure out what size heater you need:

  3. Default

    0 Not allowed!
    Thank you

  4. #4


    0 Not allowed!
    I generally use the rule of thumb of 4 watts of heating per gallon of water. That has always worked well for me in each of my set-ups

    For your tank (80 L or ~20 gallons), I would suggest a 75 or 100 watt heater.
    If you take your time to do the research FIRST, you can successfully set-up and keep ANY type of aquarium with ease.
    "Not using a quarantine tank is like playing Russian roulette. Nobody wins the game, some people just get to play longer than others." - Anthony Calfo
    Fishless Cycle Cycling with Fish Marine Aquarium Info [URL=""]

  5. #5


    0 Not allowed!
    Rule of thumb for heaters is 1 watt per liter and round up. So an 80 you could do with a 75 watt but a 100 watt would be better. Add a little more if it's in a cold room.
    Bigger heaters are usually not a problem but high wattage in tanks with little flow can get a bit funny where they are constantly switching on and off.

  6. Default

    0 Not allowed!
    Thanks again, I now have a 100 watt heater :-)

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