Are you looking for an in-line aquarium heater? For more information, please refer to our Comment Policy. Once you reach this size, you can use almost any heater you want. This easy to use heater is fully submersible, and you can place it both horizontally as well as vertically. These aquarium heaters allow you to select a temperature within a defined range, generally between 66-96˚F (19-36˚C). Hydor mini heater is suitable for marine and tropical fish, I know people who check the water temperature by simply putting a finger inside the aquarium. The following three conditions determine the correct-sized heater for you: The power of an aquarium heater is measured in watts (W). 4.4 out of 5 stars 1,741. So, assuming that you have a fish tank with the size, not more than 10 gallons. Check Latest Price. of back end support is quite sad. Please note that ALL heaters have a chance of failure, even one that could be called “the best” Anyone who tells you that there is a 100% safe aquarium heater is lying. We researched the best aquarium heaters so you can pick the right one for your tank. Inside the box, you can find a manual plus suction cup. This extremely tiny aquarium heater comes with a 90-days warranty period. The Fluval E, despite having an innacurate temperature display is probably the next best pick, but I have had trouble locating it in recent months. As you expect, the heater shuts down when the water exceeds the set temperature and switches back on when the temperature drops. I like this heater because of its different design. It can be easily fit in the small fish tank. No other fishbowl heater can be so easily hidden. But, the temp drops at night are significant enough that the Hydor can’t keep the temp at the set 75 and the water dips to 73.4-ish. And if that’s the case, you’ll be impressed by just how small these itty-bitty heaters are. Will an Aquarium Heater Melt a Plastic Tank? Besides, tropical fish like betta need warm water to survive. Would one that goes up to 5 be too small? Rosy barbs are one of the fish that get along well with goldfish. I understand failures occur, especially with heaters. Aqueon’s Mini Aquarium Heater has a small, compact size with a length of 3.1 inches. Water temperature in your aquarium (It's pretty darn important! Even though heaters today are designed to reach the desired temperature, but they can sometimes under heat or overheat your aquarium. We don’t just recommend it as the best aquarium heater for small tanks, FishLab recommends it as the best aquarium heater for all tanks! Hydor submersible glass aquarium heater is designed in such a way that it can bear shocks without any damage to the internal mechanism. GK Hart/Vikki Hart/Getty Images You have a heater… As expected, the Marina compact is fully submersible. Heaters that indicate whether they are working or not are what you need. And secondly, go for a heater which does not break easily because if the heater breaks, you will surely lose your little swimmers. JUST TO LET YOU KNOW IF YOU ARE BEGINNER: NOT ALL THE FISH NEED WARM TEMPERATURE TO SURVIVE. Do you have any reviews for heaters for larger tanks, say 75 gallon to 125 gallons? Once the water is 78 F, the device shuts off until it cools down a little. The best small heaters for tiny aquariums. Once you reach this size, you can use almost any heater you want. Due to the lack of safety features found on the following heaters, I don’t recommend them. With that choose a heater which distributes the heat evenly. Unfortunately, given Aqueon’s track record with other aquarium products we have tested, such as their air pump, gravel vacuum and water changer, there is no guarantee the replacements will be as good. It’s impressive just how slim this heater is. The temperature you want to raise your aquarium water to. I’m glad to hear you have had the same positive experience! These dimensions make the Aqueon Mini Heater the smallest aquarium heater that you could possibly get for your nano aquarium. Choosing the appropriate heater for your fish tank is important. You see, rapidly rising and falling temperatures cause your fish stress, which can soon lead to death. 5 WATT is appropriate for 1.2-gallon aquariums. You will need to contact the manufacturer or return it to your petstore. Pretty sad. With 25, 50, 75, 100, 150, 200, and 300W options, there will be a model that is the perfect power for your tank. Hydor submersible glass aquarium heater is not difficult to use; all you have to do is set a temperature between 67 – 91°F. It would, but it also costs more and has the problem that if it gets stuck “on” it will cook your fish. Most importantly, it’s the smallest adjustable heater on the market. The next aquarium heater is the only one you should consider…. Content found on fishlab.com is for informational purposes only and is not intended to be a substitute for professional veterinarian advice. This aquarium heater by Cobalt Aquatics is a great way to kick off this list of the 11 best aquarium heaters. Let it be cool first then take it out. This heater is capable of raising the temperature to 10 degrees above the room temperature. The Marina Compact is factory set at 78˚F (26˚C), the ideal temperature for most tropical tanks. Smaller tanks require a higher Watt heater as compared to larger fish tanks. It looks like that is a UK or Australian brand? And as expected, it is pint-sized…. If you have multiple aquariums with small tanks, consider a mini-heater instead of the big submersible ones. What decorations are toxic for fish tanks? At the time of writing this, the oldest one has been going strong for over 6 years. Adjustable Aquarium Heaters. You can and should completely cover it with water! The water is still too cold!”. Let me make it clear that the heaters I listed earlier in the guide are superior in every way. A red light indicates that the heater is on and running while the green light means that the desired temperature is obtained, This fully submersible heater can be installed vertically as well as horizontally. Unfortunately, it’s the state of the hobby at the moment. Which heater do you use to warm the water in your small tank? What size of heater would you reccomend for my 5 1/2 gallon tank? To answer your question, both would work. ViaAqua offers the best small aquarium heater in 50 watts for 10-13 gallons of water. So the only thing you need to worry about is whether the temperature your heater is maintaining is appropriate for your fish. Fluval Edge Compact Aquarium Heater can be used in both freshwater and saltwater tanks. However, you can get around this with the use of an aquarium temperature controller. Out of all the aquarium heaters we reviewed, the Cobalt Neotherm was the clear winner.