What is the ideal water temperature for tropical fish tanks? - Quora
A thermometer should be used to see what the temperature is staying at, which should ideally be 76-78 degrees for most tropical fish
The temperature should range from a low of 72 degrees to a high of 80 degrees, but the ideal temperature is 76 degrees for tropical fish. fish will adapt to this temperature. For breeding the fish like it around 78 degrees, but find out through the internet on breeding or ask a pet store. I have a 75 gallon and keep the temperature at 76 degrees with no problem. One important item for you: Please keep the aquarium away from an outer wall and a heater vent so the water temperature does not flucuate drastically. Another point to consider is: Change 20% of the water at least once or twice a week to keep your fish healthy and living longer. Ignore what the others are saying about temperatures above 78 degrees. They have different breeds of fish that may not be compatible with other tropical fish.
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.
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What should the fish tank temperature be set at? The aquarium water temperature depends on the fish species in question. Different species require different temperatures. Generally speaking, for tropical fish a good temperature range would be anywhere from 72 °F to 78 °F (22 °C to 26 °C);. Research the fish you're interested in keeping before buying since some have different temperature requirements. For instance, the freshwater requires higher temperatures than most tropicals.We were curious of a few things, 1) I've had a pleco living with gold fish, at room temp. very happily for many years. What is the ideal temp. and or a happy range for those type of fish. 2) Should we shift our focus to tropical fish, if our tank can't stay cool? 3) Any ways to figure out exactly what is causing this, and a reliable way to keep the temperature stable. 4) Suggested fish, if we have to make a 180 and go for tropical fish.