Heater ( aquarium ) - Wikipedia Heater ( aquarium ) A typical glass - tube immersion style aquarium heater An aquarium heater is a device used in the fishkeeping hobby to warm the temperature of water in aquariums. Most tropical freshwater and marine aquariums are maintained at temperatures that range from 22 - 30 ° C ( 71 - 86 ° F ). The types include glass immersion heaters and undergravel heating. There are also heating mats that may be placed under the aquarium. Contents 1 Glass immersion heaters 2 Undergravel heating 3 Undertank heating 4 See also 5 References Glass immersion heaters Most commonly, aquarium heaters are immersion style heaters, these heaters consist of a glass tube containing a heating element wound around a ceramic or glass insert. Some glass immersion heaters also contain sand, and most, but not all, are fully submersible. The glass tube also contains an adjustable thermostat which turns the heating element on to maintain the required temperature. This thermostat is often a bimetallic strip ; because the strip contains two metals, the metals will expand at different rates when the temperature rises, causing the strip to bend. This strip carries the current, but breaks the current at the correct temperature. The setting of this bimetallic strip can be adjusted. More advanced thermostats may use microchip technology. A small light in the heater is often included to indicate operation. In a small aquarium, one heater can be used ; however, in a larger aquarium, two or more may be used. This has the added advantage of one heater being able to compensate in the event of one heater malfunctioning. Undergravel heating Heating of the aquarium can also be achieved via a heating element in the form of a flexible heating cable that is buried beneath the aquarium substrate. Undergravel cable heating is popular in heavily planted aquariums. Undertank heating Main article : Undertank heater Aquaria can also be heated by the use of heating mats which are placed beneath aquaria. Glass is, however, a poor conductor of heat and thus reduces the efficiency of this method of heating. See also Aquarium Fishkeeping References ^ Jump up to : Riehl, Rüdiger. Editor. ; Baensch, HA ( 1996 ). Aquarium Atlas ( 5th ed. ). Germany : Tetra Press. ISBN 3 - 88244 - 050 - 3. CS1 maint : Extra text : authors list ( link ) Jump up ^ Sands D ( 1994 ) A fishkeepers guide to Central American cichlids. Tetra Press. Belgium pg 59 - 60. Jump up ^ Mills D ( 1993 ) Aquarium Fish Harper Collins ISBN 0 - 7322 - 5012 - 9 ^ Jump up to : Sanford, Gina ( 1999 ). Aquarium Owner 's Guide. New York : DK Publishing. p. 169. ISBN 0 - 7894 - 4614 - 6. Jump up ^ `` How to choose an aquarium heater ''. AquaDaily. 2009 - 02 - 10. Retrieved 2009 - 02 - 10. ^ Jump up to : Axelrod, Herbert, R. ( 1996 ). Exotic Tropical Fishes. T.F.H. Publications. ISBN 0 - 87666 - 543 - 1. Jump up ^ Uwe Behle, Dan Resler. `` Do - It - Yourself Substrate Heating Cables ''. Retrieved 2007 - 04 - 05. Aquariums and fishkeeping Aquarium types Freshwater Marine Reef Brackish - water Community Biotope Aquarium décor and equipment Airstone Algae scrubber Berlin Method Bog - wood / Driftwood Calcium reactor Deep sand bed Filter Fishcam Fish feeder Heater Lighting Live rock / Live sand Powerhead Protein skimmer Refugium Substrate Sump Fish terms / types Algae eater Bottom feeder Coldwater Dither Hardy Painted Tropical Fish food Brine shrimp Daphnia Feeder fish Infusoria Shrimp mix Tubifex tubifex Other concepts Aquarium fishery Aquascaping Artificial seawater Bath treatment Clean - up crew Disease in ornamental fish Macquarium Project Piaba Quarantine tank Reef safe Spawning triggers People Takashi Amano Herbert R. Axelrod Leonhard Baldner Pierre Carbonnier Edward Edwards Philip Henry Gosse Sven O. Kullander William Alford Lloyd Paul Matte Julian Sprung Anna Thynne Charles Haskins Townsend Jeanne Villepreux - Power Robert Warington Magazines Aquarium Fish International Koi Practical Fishkeeping Tropical Fish Hobbyist Companies Drs. Foster & Smith Eheim Hagen Sera Tetra Lists Aquarium diseases Aquarium fish by scientific name Freshwater aquarium fish / amphibians / invertebrates / plants Marine aquarium fish / invertebrates / plants Brackish aquarium fish / invertebrates / plants This fishkeeping - related article is a stub. You can help Wikipedia by expanding it. Retrieved from `` https://en.wikipedia.org/w/index.php?title=Heater_(aquarium)&oldid=785420042 '' Categories : Fishkeeping Heaters Fishkeeping stubs Hidden categories : CS1 maint : Extra text : authors list All stub articles Talk Contents About Wikipedia Norsk Polski Русский Українська Edit links This page was last edited on 13 June 2017, at 12 : 43. 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Question: what is the use of heater in aquarium
Answer: warm the temperature of water in aquariums