Temperature tropical fish tank should

Choosing an Aquarium Heater

Aquarium heaters are necessary when the room temperature is too cool for fish or the day to night time temperature fluctuates a lot.

Most tropical fish require a consistent water temperature of 76 degrees Fahrenheit. Do some research on the types of fish you want to keep. Some species may need temperatures of 82 F to 86 F where as another species may require 72 F to 75 F. When choosing an aquarium heater remember, you really get what you pay for. Cheap aquarium heaters have thin glass tubes and inferior internal components. They break easily and can get stuck in an on position, over heating your fish tank and killing your fish. Higher end heaters very rarely stick in an on position and have thicker higher quality glass tubes. A lot of aquarium heater manufacturers do not warranty the glass parts of the heater. So if you purchase a cheap low end heater, be prepared to possibly be buying another heater in under a year.

For aquariums up to 100 gallons you will need approximately 3 to 5 watts of heat per gallon. Example: 5 watts x 30 gallon tank = 150 watt heater.

Larger aquariums usually have different heat requirements depending on the filtration system. If you are using a wet dry filter the main return pump will produce some heat, so you won’t need a large heater, or in some cases no heater at all.

Higher quality heaters are usually more efficient, so check the manufacturer’s recommendations. In hot climates a heater may not be necessary. Just remember if the daytime ambient room temperature is 80 and the night time ambient air temperature is 72 you will need a heater to keep the aquarium temperature stable. Three to five degree Fahrenheit temperature changes over the course of a day can cause the fish to get very sick

When adding a heater to your aquarium let the heater sit in the water for a minimum of ½ an hour before plugging it in. This ensures that the heaters glass tube is the same temperature of the water helping to prevent thermal cracking and the loss of your heater. Also if you ever need to remove your heater from the water unplug it for at least ½ hour before removing.


Tetra's are tropical fish

by Asidi

They should have a consistant temperature around 74 - 78 degrees. You can get away without a heater if your room temperature is always in that temperature range, but you're better off with the heater. If something happens to drop the temperature more than a degree or two in a short period of time the fish could get sick, but if the change is very gradual it won't affect them that badly as long as it doesn't get too cold.
(I have a 55 gallon tropical fish tank currently running without a heater. The reason is that the temperature here has been over 100 degrees for the past I don't know how long and I can't even get my air conditioner to cool my house below 85

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