Your Guide to Submersible Aquarium Heaters

by Trevor J Rockberry on November 8, 2010

What is an aquarium heater?

When aquarium fish come from warm waters and hate fluctuating water temperatures, aquarium heaters provide effective and inexpensive means of keeping tank water temperatures stable. Since fish do not produce their own body heat, they need an aquarium heater to prevent sudden changes in water temperature. There are three varieties of aquarium heaters – hanging, substrate and submersible heaters. However, most aquarium owners recommend the use of a submersible aquarium heater, particularly for beginners.

Why submersible aquarium heaters?

Submersible aquarium heaters are designed to be fully immersed in water and are generally more efficient in maintaining ideal aquarium temperatures than hanging or exterior heater types. Installation is easy as they can be completely submerged or positioned vertically, horizontally or at an angle, whichever will work best for your aquarium. One thing about submersible aquarium heaters is that they have internal thermostat, which activates and deactivates to maintain when ideal aquarium water temperatures are reached. In addition, submersible aquarium heaters easily attaches to the back of the aquarium. You can use either a suction cup or clip to secure the cables in place. Contrary to common misconceptions submersible aquarium heaters pose minimal risks of electrocution for you or your fish.

Top submersible aquarium heaters

When it comes to submersible aquarium heaters, Hydor THEO is among the top recommended heaters by hobbyists. The brand uses a patented heating element, which is made of a special polymer that has been silk printed with special ink. The ink is heated up by the passing electric current; the heat is then transferred to the water. To ensure long-term service, it adopts a shatterproof glass. It features a precise built in thermostat features an on and off indicator lamp that switches on and off when the set temperatures have been reached, which protect the unit against overheating. What’s more important is that it can be used in both fresh water and marine aquariums.

Hydor THEO submersible aquarium heaters are available in mini heater 7.5-watt, 15-watt and larger range 25-watt, 50-watt, 150-watt, 200-watt and 400-watt units. The unobtrusive design of these heaters made them easy to use, which make them a great choice for beginners. Aside from precise temperature maintenance, all Hydor THEO aquarium heaters feature high resistance, shock resistance, and no damage in case of running dry. If you are looking for an affordable submersible aquarium heater, the Hydor THEO selection will give you a nice heater for a good price.

Tips on getting the right size of heater

The key to enjoying your great valued and efficient submersible aquarium heater is getting the right size for your aquarium. As a rule of thumb, simply subtract the average room temperature of the area where you place your aquarium from the temperature you wanted to maintain for your aquarium water. The answer will show the number of degrees the aquarium needs to be heated. Usually, temperature differences go from 5 to 15 degrees. In general, 5-gallon tanks require 25 to 75-watt heaters; 10-gallon tanks require 50 to 75-watt heaters; 20 to 25-gallon tanks require 75 to 150-watt heaters; 40-gallon tanks require 100 to 300-watt heaters; 50 gallon tanks require one 150-watt or two 200-watt heater units; and 65 to 75-gallon tanks require one 250-watt to two-300 watt heater units.

Finally

Hopefully, these practical hints and tips will guide you on how to choose the right size and type of aquarium heater to use in maintaining your collection of colorful freshwater or marine life.

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