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Guppy fish is the most common fish everyone loves to add to their community tank. They are peaceful and do great with other compatible tankmates. You just have to feed them regularly and provide them with their ideal water temperature to thrive. Therefore, it is essential to know the ideal water temperature of guppies when planning to add them to your home aquarium. So, What is the ideal water temperature for guppies? Let us find out. 72-82 °F is the ideal water temperature of guppy fish. However, guppies can survive in water below and above these temperatures, but for a short time. Too hot or cold water temperature will stress your guppy fish, and they can be prone to various diseases and parasites. This article will discuss whether guppy fish can live in too cold and hot water. Also, we will discuss how the unstable water temperature affects guppy. So let us get into it. Guppy fish ideal water temperature Guppy fish require a water temperature between 72-82 °F. Your guppy fish thrive between these temperatures. They can survive below or above these temperatures, but we are talking about survival and not living comfortably here. Inadequate and unstable water temperatures make your guppy fish come under stress. And you must know that constant stress will make your guppy fish prone to various diseases and parasites. So, make sure to provide your guppy fish with their ideal water temperature to prevent such issues. What is the minimum water temperature for guppy fish? 72 °F is the minimum water temperature for your guppy fish. However, guppy fish can survive at a low water temperature of 60 °F. But they will not survive for a long time in such water temperature. In such water temperatures, your guppy fish will get weak and prone to various diseases and parasites. Also read: Guppy Fish Minimum Water Temperature. Can guppy fish live in cold water temperature? Guppy won't survive long in cold water temperature. The cold water temperature will make your guppy fish lethargic. Guppy fish will not move much and will be inactive most of the time. Guppies prefer warmer water to live comfortably. The cold water will make them come under stress, and they will be prone to various diseases and parasites. Also, some diseases and parasites can make your guppy fish pass away. The cold water will also create an issue in the breeding of guppies. Your guppies will suffer breeding or will stop breeding at all. In their natural habitat, guppies can move to the warmer water when it's cold, but they don't have an option like this when kept in captivity. So, consider providing your guppy their ideal water temperature so that they can live comfortably and have a healthy lifespan. What is the maximum water temperature for guppy fish? 82 °F is the maximum water temperature for guppy fish. Guppies can survive in a water temperature as high as 90 °F. But, they will not survive for a long time in this water temperature. Can guppy fish live in hot water temperature? Guppy fish do prefer to live in warmer water. However, too hot water can make your guppy fish suffer from a life-threatening condition. Hot water will make your guppy fish hyperactive. Your guppy will swim erratically because of boosted metabolism. Such activeness can make your guppy fish come under stress, and they can even pass away. Also, hot water will not be able to contain oxygen which will result in your guppy fish suffocating in their aquarium. You must know that good bacteria in our guppies aquarium require oxygen to break down ammonia. In the absence of oxygen, beneficial bacteria will not be able to eliminate ammonia from your guppies aquarium, and your guppies will suffer because of that. So all this information states how important it is to provide our guppies their ideal water temperature to thrive. Also, with ideal water temperature, stability in water temperature is equally important to make your guppies away from stress and other issues. How can we lower the water temperature of the guppies tank? You can perform these things to lower the water temperature of your guppies tank: Avoid keeping your guppies tank where comes direct sunlight.Switch off the aquarium light.Turn on the air conditioner. Remove the aquarium lid.Use a fan to cool down the water temperature. Avoid direct sunlight Keeping your guppies aquarium in a place where there is no way of direct sunlight will help you cool down the water temperature. So, make sure not to keep your guppies tank near the window. You should place your guppies aquarium in a room that is usually darker than regular, where no sunlight comes, and where you don't have to keep the lights on during the whole day. This way, you can lower the water temperature of your guppies aquarium. Switch off the aquarium light Artificial light also contributes to heating the water. So, turning the aquarium lights off will help you lower the water temperature of your guppy fish aquarium. Turn on the air conditioner. Turning the air conditioner on is the primary way of cooling down your guppy's aquarium water temperature. If you have an air conditioning system in your home, consider keeping it on so that the temperature gets reduced and the water temperature of your guppy fish aquarium also cools down. Remove the aquarium lid. Removing the aquarium lid will prevent heat trapping inside your guppies aquarium. Removing the aquarium lid will help you release some heat out from the aquarium. However, you must know that guppies are jumpers. So do care of this thing when removing the aquarium lid. Also, if you have other pets like a cat in your home, consider keeping them in another room. Use a fan You can use a fan to cool down the water temperature of your guppy fish tank. Point the fan towards the aquarium surface and turn it on. How can we increase the water temperature of the guppies tank? There will be a heater requirement for increasing the water temperature of your guppies aquarium. Let us know the correct wattage of the heater you will be required according to the size of an aquarium to keep your water warm. Aquarium SizeRequired Heater Wattage5 Gallon /20 Liter25 W10 Gallon / 40 Liter50 W20 Gallon / 80 Liter100 W25 Gallon / 95 Liter125 W40 Gallon / 150 Liter200 W50 Gallon / 190 Liter250 W65 Gallon / 250 Liter2 X 200 W75 Gallon / 285 Liter2 X 300 WThis table shows the heater wattage requirement for different sizes of an aquarium. Also read: Does Guppy Need Heater? How can we keep the water temperature stable? With adequate water parameters, stable water temperature is equally essential for your guppies to thrive. Unstable water temperature can make your guppy fish come under stress, and they can be prone to diseases and parasites. So, to ensure stable water temperature, you have to add a heater to your guppies aquarium. Adding a heater to your guppies aquarium will help you keep the water temperature stable. Also, don't always rely on the water heater. Consider using a digital thermometer to check the water temperature of your guppy fish aquarium. Using the thermometer will help you detect the stability of water temperature. Conclusion: Guppy fish require a water temperature between 72-82 °F. However, guppies can survive below or above these temperatures, but only for a short time. Also, you must know that with ideal water temperature, stability in water temperature is equally essential for your guppies to live comfortably and thrive. So, consider adding a heater to your guppies aquarium to ensure stability in water temperature. Reference: ResearchGate, NCBI, NCBI, Wikipedia,