Heat up fish tank water quickly the guide youve been waiting forYou might want to know what you can do to heat up the fish tank water quickly as the temperature of the average fish tank fluctuates quite often. It is vital to keep the water temperature of an aquarium under control if you want your fish out of harm’s way. That’s where our aquarium experts can provide help.

This article will give you an in-depth look at the steps needed to maintain a normal temperature range.

How To Heat Up Fish Tank Water Quickly?

Keeping their fish collection in the perfect possible settings is crucial for any aquarist. The temperature inside an aquarium determines whether your fish will survive and thrive or die.

An appropriate range for fish tank temperature is 76 F to 80 F. But the thing that fish owners must keep in mind when it comes to the climate inside your fish tank depends on the species you keep. Some species require cooler temperatures, while tropical fish require warmer conditions.

The best thing you can do is find out as much as you can about the species of fish you keep in your aquarium. Additionally, having a thermometer, particularly a stick-on, is a must. A thermometer will give you a clear idea about the temperature inside a fish tank whenever you look at it.

However, knowing how to heat up aquarium water is a fundamental requirement, especially if you keep tropical fish and live in a place with colder weather.

Here’s the way to get the job done with ease and efficiency.

1. Get a Fish Tank Heater

The easiest way to warm up a fish tank is by investing in an aquarium heater. You can apply several effective techniques to bring up the temperature in the aquarium.

However, most of these solutions are temporary. But a sturdy heater from a reputable company with a warranty is a remedy for life.

A decent fish tank heater will regulate the climate inside the aquarium at all times and prevent any fluctuations in temperature. And it will provide you with more time to focus on aquarium maintenance and give you a sense of serenity knowing that your fish are safe and well looked after.

2. Maintain the Room Temperature

If you don’t have a thermostat for your fish tank, you can use specific ingenious hacks to help you out. Regulating the room temperature will speed up the fish tank water heating process.

To further explain this with an example, if it’s cold outside, use your room or house thermostat, if you crank up the heating in the room, your aquarium will heat up fairly soon too.

A larger fish tank may take some time to heat up; however, this trick will work every time if you own a small fish tank.

3. Get a Smaller Fish Tank

Most fish owners use this ideal technique when their aquarium heaters die on them. You see, a smaller fish tank, one where your fish are happily accommodated but not cramped, will help fix variations in the climate inside the fish tank.

The amount of water that needs heating up is less, hence the task becomes more straightforward. The placement of a smaller fish tank is less complicated; insulation and moving it around becomes less difficult. Nonetheless, the proper maintenance of the fish tank becomes a much less arduous task.

In addition, you can always use a smaller emergency heater to heat the aquarium when the need is dire. therefore, if you have a thermostat to regulate your home’s temperature, a smaller fish tank will not even present the need for a heater.

4. Insulation Will Aid You

Wrapping your fish tank up with paper, foam, fiberglass, or even a warm blanket will serve to retain the warmth of the fish tank from escaping.

There is no denying that insulating your aquarium will minimize heat loss. Nonetheless, it is a rather peculiar-looking and short-term solution to a power outage or a faulty heater.

You can buy styrofoam insulation sheets used by building contractors to insulate homes and apply double-sided sticking tapes to stick these sheets to the sidewall of your fish tank. If the fish tank has a top cover, don’t forget to apply the insulation sheet to that as well.

Using household items in case of emergency works just as well in providing insulation such as aluminum foil. You can apply several layers of aluminum foil using scotch tape and then use cling film to insulate further. The cling film works wonders in keeping the aluminum foil in place as well as retaining heat, through this particular hack, you will manage to keep a fish tank warm in a cold room.

However, if you are afraid that you will lose all visibility to your beloved pets by covering up the fish tank completely, you can always cover up the three sides of the fish tank. This way, you can leave one wall free of any covering, thus providing you room for supervision.

Nevertheless, in times of extreme weather, electricity outages, and heater breakdowns, insulation is a scheme that doesn’t pose any threats to the fish in your tank. And while it does little to produce warmth, insulation can work well to prevent heat loss.

5. Transfer Your Fish Tank

Novice fish keepers place their fish tanks close to windows or in areas with excessive cross ventilation. Furthermore, in cooler climates, even an aquarium heater will have to work overtime to control the weather inside the aquarium. Hence, if you place the marine museum closer to the kitchen or a room with proper heating, you will be able to keep fish bowl warm with little effort.

Nonetheless, many fish keepers vouch that placing their fish tanks closer to the fireplace, radiator, or even direct sunlight is very helpful in getting the heat back into your fish tank. However, keeping a fish tank close to such places means that you might end up causing damage to your aquarium or your fish’s well-being.

Keep in mind that excessive heat from the fireplace or even direct sunlight can cause the glass of the fish tank to crack or shatter and, the surplus heat can very well kill your fish. Therefore, if you do take such severe actions to warm the water in your fish tank, you will have to monitor the entire scenario minute by minute.

6. Using Unorthodox Means

As a fish keeper, you must understand that some of the techniques offered in this particular area are somewhat out-of-the-ordinary. And you will find out that they work. Yet, once again, if you plan to use any of these methods to warm up your fish tank, you will be required to practice extreme caution.

You can make use of a heating pad, also known as an under-tank heater or heating pad. These devices are placed under the aquarium and plugged into a socket to provide heat.

Most heating pads have options available in terms of the heat setting you want, from mild to medium to hot.

However, if the water in the fish tank is cool and the heating pad is too hot when it is placed under the aquarium, you will have a disaster on your hands. So, if you do apply the heating pad approach, keep to low settings and keep constant supervision.

Using a hot water bottle is another practice that can be used to heat the water inside a fish tank quickly. If you fill up a hot water bottle with warm or hot water, securely close the lid, and place it inside a fish tank, the heat permeating from the water bottle will regulate the fish tank’s water.

However, it is a ‘mad hatter’ trick that should be used only in the case of emergencies and with extra care. Another DIY method that is relatively popular with fish owners when it comes to how to keep a fish tank warm without a heater is to use a hot plastic water bottle.

You can take a liter bottle, fill it up with warm water and gently place it in the corner of your fish tank. It will take a while to work, but the warmth from the plastic bottle will eventually control the cold inside the fish tank. Sure, it is a device that works. But, you ought to know that is a short-lived solution.

FAQ Section

Many aquarists find themselves boggled with the umpteen choices they face when it comes to aquarium size, heater wattage, and the right temperature for the aquarium. The FAQ section is meant to provide you with the answers to some queries you might have regarding the upkeep of your fish tank.

1. What Kind of Heater Wattage Should You Use for a Fish Tank?

As mentioned before, not all species of fish require warmer temperatures. But, if you house tropical fish in your aquarium, you will have to get a heater for the aquarium.

For normal temperature, you will need to have approximately 100 watts for 20 gallons of water, 175 watts for 55 gallons, and about 300 watts for 200 gallons of water. For smaller tanks, you will need to have a heater that is 5 watts per gallon. On the flip side, you will need only 3 watts for a bigger tank.

The logical rule applies that a large amount of water may take more time to heat up but stays warmer for longer. And a smaller fish tank with less water warms up quickly but loses heat just as fast, so you will need more wattage to keep a steady climate inside the aquarium.

2. What Kind of Heaters Are Available for Fish Tanks?

You may be surprised by the range of heaters available in the market for heating up a fish tank. Nonetheless, there’s probably going to be one that fits your budget.

You see, there are many different kinds of aquarium heaters to be found. There are submersible heaters as well as hang-on heaters. Hoang-on heaters tend to fall into the low-price range, whereas submersible ones are obviously pricey as these are water-proof.

All heaters are thermostatically controlled, and many offer specific temperature settings too. The most commonly used are heaters in glass tubes. But, you will also have the option of the more expensive titanium and stainless steel heaters.

Some heaters provide easy-to-use and straightforward colder-warmer adjustments. Other heaters will give you precise temperature settings or a set of temperatures you can choose to maintain steady weather in the fish tank. There are substrate heaters and filter heaters out in the market that significantly aids in keeping the water warm inside a fish tank, even in colder climates.


Heat up fish tank water quicklyIt’s safe to say that you can now heat a fish tank quickly without a heater, using the information you possessed from our article. So, let’s go over the finer points of the article before you go:

  • Different species of fish require different temperatures. Some fish, such as tropical ones, need warmer temperatures while other fish species sustain in cooler settings.
  • The temperature of the fish tank must be kept steady to ensure your fish’s well-being.
  • You can apply several techniques to warm up the water in your fish tank in an emergency.
  • It’s best to use great care when adjusting the fish tank’s temperature, as sudden changes will harm your fish much more than heat loss in the water.
  • If you cannot get the job done right without a heater, then it’s best to buy a heater for your fish tank or obtain the advice of an expert to help you get your fish tank at optimal temperature.

Now you can heat the fish tank water quickly as you have gained the necessary knowledge about the various methods you can apply to help you in a power outage, heater breaks down, or an emergency. Sit back and relax as you watch your fish enjoy excellent weather in their marine museum.

5/5 - (16 votes)


Please enter your comment!
Please enter your name here