Tropical fish tank 80 degrees

How to Keep Aquarium Temperatures Constant

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The majority of aquarium fish need temperatures between 75 and 80 degrees Fahrenheit. This range covers the ideal temperature for both freshwater and marine fish from the tropics. However, exceptions exist. For example, goldfish need somewhat lower temperatures -- from 68 to 72 degrees Fahrenheit -- to be at their best. Also, temperate and cold-water marine aquariums have become more popular in recent years, which often feature fish and invertebrates that thrive around 60 degrees Fahrenheit. Always research your individual species for their ideal temperature. Above all, avoid sudden shifts in temperature. Fish have a harder time adapting to sudden changes than they do to wrong temperatures. Avoid letting the temperature deviate more than 2 degrees a day.


You have several options in aquarium heaters. Hanging models attach to the lip of the tank with their control element above the waterline. Submersible units are designed to function completely underwater and drop in the tank. More expensive heaters fit in external equipment that transfer heat to the tank via sump. Whatever style of heater you use, make sure you get one whose capacity exceeds the volume of water in your tank. Heater output is measured in watts. Generally, you want to get 3 to 5 watts of heater power per gallon of tank. Ideally, you want to achieve this with multiple heaters, which serves to maintain temperature in case one fails. This helps keep temperature constant while you replace or clean a heater. Never plug in a dry heater. Always read the manufacturer's instructions.


His water must be warm and stable.
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