For the rest of you? Let me know in the comments below! The larger the tank, the slower it releases heat. Check it out in a 1-gallon Aqueon Minibow…. absolutely avoid the Neo-Therm heaters. The next heater on our list of 7 best heaters for betta fish is the Fluval Marina Submersible Heater for Aquarium. Great aquarium heaters are easy to install, efficient, and long-lasting. Content found on is for informational purposes only and is not intended to be a substitute for professional veterinarian advice. While a tiny aquarium heater is tempting, the smallest lack essential features found in my slightly larger recommendations – these hit the sweet spot between size and safety. Buy a good, accurate and durable thermometer to check the water temperature of your fish tank from time to time. Are you looking for an in-line aquarium heater? And secondly, go for a heater which does not break easily because if the heater breaks, you will surely lose your little swimmers. First of all, check the temperature with a GOOD thermometer. And before you ask, no, you cannot skip buying a heater. Secondly, after installing your heater in the aquarium, plug it after a few minutes. Aqueon’s Mini Aquarium Heater has a small, compact size with a length of 3.1 inches. If the temperature of your room increases, say on a hot summer day, then using these heaters will also increase the temperature of your tank – which may be too hot for your fish. Unfortunately, this is the state of the hobby right now. Not all fish survive in cool water, and they die when the temperature is low, and there is no heater, because they are not capable of producing their own body heat, unlike humans. So if you are not achieving the desired temperature of the fish tank even after placement of the heater, do not start cursing the heater directly. I had a Cobalt NeoTherm cook my reef tank last summer. The main challenge comes from the limited space inside with decoration and fishes. The more watts, the more powerful the heater. You will need to contact the manufacturer or return it to your petstore. And it is small enough and fully submersible. Options range from small 25-watt units to 1,000 watts. At the time of writing this, the oldest one has been going strong for over 6 years. If your heater cannot warm your tank within 7 hours, it’s probably too small. It can be easily fit in the small fish tank. So, it’s safe to say that it is unarguably one of the best mini heaters out there, thanks to its portability. So the only thing you need to worry about is whether the temperature your heater is maintaining is appropriate for your fish. Most importantly, it’s the smallest adjustable heater on the market. 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. Yes, and again you will need a good thermometer to check the temperature of the water. The bigger your aquarium, the more watts you need to heat it. Or, maybe you want to turn the heater down during summer. and offering zero alternatives and have gone silent. Smaller tanks require a higher Watt heater as compared to larger fish tanks. © 2020 FluffyPlanet,, How to Choose an Aquarium Heater | (, Hydor Submersible Glass Aquarium Heater - Original Theo, Cobalt Aquatics 31020 5W Mini-Therm Heater, Hydor 15W MINI HEATER for Bettas and Aquariums. One of the biggest complaints with small tanks is their lack of room. Your email address will not be published. This nifty device shuts your heater off if your water becomes too hot and turns it back on once the water cools – keeping your fish safe. Do you have a pick for the heater ? 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. They’re good while they last, but unless you have a secondary safety device like an inkbird controlling them, when they go, they’ll nuke your tank. Yep, they are little more than a heating element and a cover. It is manufactured in a way that it distributes the heat evenly. With a filter aquarium heater, the water is heated as it moves through the filter. My name is Nadine; I am a passionate writer and a pet lover. Why do fish die because of the cold temperature? Heater Placement . Orlushy Mini Aquarium Heater 50W 100W 150W,Small Fish Tank Heater with LED Digital Temperatur… Note: The 50W and 75W Cobalt Neotherm models are generally the cheapest. Tough luck! Do fish tanks help relieve stress? Last Updated on November 8, 2020 by Ian Sterling 18 Comments. There are some of the decorations which when placed in the aquarium can be harmful to you fish like plastic toys, beach sand, or any sharp decorations. I’m glad to hear you have had the same positive experience! It also comes in 300 watts, which can heat to 80 gallons of water. I bought the Hydor Theo 25w for my Fluval Spec III (2.6 gallons). If I have a ten gallon tank can I buy a heater for a 20 gallon tank and put it in the 10 gallon. What size of heater would you reccomend for my 5 1/2 gallon tank? Orlushy Mini Aquarium Heater 50W 100W 150W,Small Fish Tank Heater with LED Digital Temperature Display and External Temperature Controller for Betta Frogs Newts Turtles. Now, let’s look closer at what FishLab found to be the best aquarium heaters for small-sized tanks…. People usually call me by the nickname “Joy” because they think that I am …keep reading, is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to We do not provide veterinary suggestions. The heater then turns on again, and the cycle repeats. Aquarium heater power & wattage. You must live where it’s quite cold. The Hydor Theo is an adjustable aquarium heater. Cobalt  Aquatics 31020 5W mini therm heater is fully submersible. In the past few years, a variety of small heaters has been introduced to the aquarium market. The heater can raise the temperature of the water, just a few degrees above the room temperature. Two small heaters on opposite sides of the tank (I happen to have a 10w not in use) at night until the weather warms? If you are still using year’s old thermometer, then change it. I'm here to teach you everything there is to know about fishkeeping. If the preset temperature of your fish tank is 78°F, see if it’s suitable for all your fish.