100 Watt Heater In A 30 Litre Tank

[stiffler69]

Hi all just set up my new cory hatching tank ive did originally have a 25 watt mini elite heater what couldnt get the temperature above 22 degrees its struggled badly so i went to the lfs and the smallest ones they had were 100 watt, and i bought it, it took the temperature straight upto 26/27 ideal temp and maintained it for the time been ive now lowered the thermostat to 24 as to keep a temperature around 24/25 degrees.

Am i right in thinking that the heater will be fine and just do its job more effieciently or is this too high rated for the tank volume, i would of thought the whole reason for a thermostat is too hold it at the specified temp no matter the wattage.

Oh and just to add the tank is in a cold area and only a couple of inchs from ground level so the extra wattage should help keep the chill off.

Has anyone else done something similar and did it work out for them.

 

[aaronnorth]

A 50w would be better, 25w to small, (1w per litre). The trouble with having a larger heater is that it will heat the water up quicker rather than gradually so it may affect the fish because of a massive increase in temperature.

 

[stiffler69]

A 50w would be better, 25w to small, (1w per litre). The trouble with having a larger heater is that it will heat the water up quicker rather than gradually so it may affect the fish because of a massive increase in temperature.

No fish in the tank and i want to maintain a steady 25 degrees 2 degrees lower than my main tank as when i introduce my corys to this tank the lower temperature will encourage them to spawn in the hathcing tank they will then be placed back into the main tank once spawned but i will only do this after a water change and i will bring the temperatures of both tanks down to 25 degrees then allow the main tank to steadily increase again, see i also need cold changes in the main tank to encourage my bristlenose's to spawn