Aquarium heaters are essential equipment for your freshwater and saltwater aquariums. The rule of thumb is, the ratio between heater wattage and aquarium size should be about 3 to 5 watts for each gallon to keep your fish happy and healthy.
So let’s say, for example, a 50-watt heater will heat properly for an aquarium with about 10 to 15 gallons. It’s a known fact that some aquarium heaters work better than others depending on the aquarium size. So, today we’ll take a look at what makes a good aquarium heater and some of my recommendations.
- Best Aquarium Heaters for Large Aquariums
- Best Aquarium Heaters for Small Aquariums
Best Aquarium Heaters for Large Aquariums
For those fish lovers who just can’t get enough of those aquatic friends, and choose to own a large aquarium, here is what to look out for in heaters.
- Choose a heater with a large wattage, usually about 300-watts or more since the tank would hold a lot of water, ranging from 50 to 75 gallons.
- The reliability of the heater, the last thing you want is to over (or under) heat the water and make the fish uncomfortable.
- With a large tank, consider using two smaller heaters. That way the heat will be evenly distributed to your fish community, as you can place them in opposite ends of the tank.
- Having two smaller heaters is also good, when one fails at least you still have one heater to keep your fish warm until you can get a replacement.
Recommended heaters for Large Aquariums
1. The Hydor Theo Aquarium Heater (300 watt)
The Hydor Theo 300W Heater is a fully submersible heater. It’s known for it’s durability, so it can be counted on to last a very long time.
- The Hydor is shock resistant having a PTC heating element, and a shatterproof glass tube, a durable choice for your aquarium.
- Suction cups able it to freely position in your aquarium.
- Patented PTC heating system provides for a self-limiting system, guarantees safety in case of dry running.
- The Hydor has a temperature range of 70-97 degrees Fahrenheit.
2. AquaTopModel GH-300 Submersible Heater
The Aquatop Aquarium Glass Submersible Heater, 300-Watt helps to maintain a constant and stable temperature.
This heater being fully submersible offers up a simple and easy installation with the use of suction cups, and can handle aquariums up to 75 gallons.
- 300 Watts
- Can be used in fresh water and salt water tanks.
- Insulated glass construction of the highest of quality.
3. ViaAqua Titanium Heater (300 Watts)
The ViaAqua Titanium Aquarium Heater, 300-Watt, is one of the latest versions of ViaAqua heaters. It features LCD temperature readout, a high-tech way to keep an eye on your tank.
- Titanium heating element
- Adjustable temperature setting
- Fully submersible
Best Aquarium Heaters for Small Aquariums
If you’re more of a casual fish fan, then you’d probably have a smaller aquarium – less fish but hey it’s not how many you have it’s how you take care of them. One way of taking care of them is choosing the right heater. Here are some things to look for:
- Choose a heater with wattage of 25 to 75 watts.
- Durable and long lasting, to avoid replacing it often.
- Have an extra heater just in case; with a small tank using two heaters is not that practical.
Recommended Heaters For Small Aquariums
1. Marina 17W Mini Heater
The Marina 17W Mini Heater, with a name like that what could possibly go wrong? It is simple and easy to set up and ideal for use in your glass or plastic tanks.
The Marina Heater is a one piece unit and unbreakable.
- Easy to use and reliable, great for you starting out on your aquarium journey.
- Turns any tank into a tropical tank. Can be used for glass or plastic tanks.
- Used for tanks around 14 liters (3 gallons).
2. Fluval EDGE 25w Heater
The Fluval Edge 25W Compact Heater is an automatic, submersible heater for use in your indoor aquariums, great for your tanks that accent the room.
Simple and easy to use – with just small adjustments you can preset it to reach and maintain a temperature of 78F.
- Unlike traditional glass sleeve heaters that will crack or break, this bad boy has and exterior made of tough polymer, strong and durable.
- The heater is ideal for tanks up to 6.6 gallons (25 L) and can be used in fresh or saltwater tanks.
- Easy to use and reliable.
3. Hydor Aquarium MINI HEATER
It is simple and easy to conceal in your miniature tanks.
- 7.5 watts for 2-5 gallon tanks (10-25 L).
- Completely submersible.
For anyone that owns an aquarium, it is important to consider using the ideal heater in order to ensure that your fish remain happy and healthy.
Remember, it should be durable and reliable so you can simply worry about enjoying your pet fish!
If you have more tips or recommendations for aquarium heaters, please share your thoughts in the comments section below.