Aqueon Aquarium Fish Tank Heater, Preset, Up to 20 Gallons, 50 Watts | 20 gallon aquarium heater, fully submersible with auto shut-off, preset 78° and shatter-resistant quartz glass

Aqueon Preset Aquarium Heaters require no adjusting! The preset temperature has been calibrated to 78°, appropriate for most tropical fish. This 50W unit, ideal for aquariums up to 20G,  is fully submersible, constructed of shatter-resistant quartz glass and features an automatic safety shut-off to avoid overheating. The heaters include suction cups and can be placed vertically or horizontally within the aquarium.  An LED indicator light displays red when actively heating.
Product Dimensions ‏ : ‎ 3.5 x 1.5 x 7 inches; 7.2 ounces
Manufacturer recommended age ‏ : ‎ 1 month and up
Item model number ‏ : ‎ 100106251
Date First Available ‏ : ‎ November 26, 2014
Manufacturer ‏ : ‎ Central Garden & Pet
ASIN ‏ : ‎ B00Q78MMT6
Best Sellers Rank: #21,794 in Pet Supplies (See Top 100 in Pet Supplies) #31 in Aquarium Heaters
Customer Reviews: 4.3 4.3 out of 5 stars (872) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Preset to 78°, accurate to +/- 1°
No adjustment required
Shatter resistant
Auto shut-off
LED light turns on when aquarium water is being heated