What size heater for a 400litre tank in my garage.

[fishboy123]

Hello,
I have a garage that I have converted to a game room and i have a big 400litre african cichlid tank in there. I have two 150w heaters keeping the tank warm but they do not maintain the right heat of 26/27c when I go in there in the morning it is at 24c and both the heaters are set to 35c on full and still can't keep the temperature right. What size heater would I need to keep the tank at a constant temperature. Also the garage is insulted so doesn't get to cold in there.

 

[flchamp89]

Is that a 90g?

3 to 5 watts the general rule. But id say a garage even insulated might not be the general rule. I like two heaters in larger tanks like you have.

Getting a heater bigger than whats recommended means it wont work as hard and will hold temps better. It sounds like to me yours are little small. Id want a minimum of 400w.

 

[Fresh2o]

It would be important to know the temperature of the garage as this will influence the wattage needed to heat the tank.

 

[fishboy123]

The lowest the temperature it will get in the air will probably be about 5c

 

[Brookster123]

That's pretty cold, if the heaters ever fail than you have dead fish in 24hrs. May want to reconsider the location??

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