{"product_id":"dattoo-25w-mini-aquarium-heater","title":"DaToo 25W Mini Aquarium Heater, 25W, with thermometer sticker","description":"\u003cp\u003eOnce the 25W DaToo heater is fully submerged, it warms the water to 78°F on its own and holds it there. No dial or setting is involved. It is sized for 1 to 6 gallon desktop tanks in glass or acrylic. The body is quartz glass with a rubber sealing layer instead of a plastic seal, and a thermometer sticker comes in the box.\u003c\/p\u003e\u003ch2\u003eWhich tanks this 25W heater suits\u003c\/h2\u003e\u003cp\u003eTwo volume figures are given: 1 to 5 gallons for small fish tanks and 1 to 6 gallons for desktop glass or acrylic aquariums. A tank larger than 6 gallons falls outside both ranges.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMeasure the water volume, not the outside of the glass.\u003c\/li\u003e\n\u003cli\u003eConfirm the tank is glass or acrylic if it falls in the 6 gallon upper figure.\u003c\/li\u003e\n\u003cli\u003ePlan for the heater to sit entirely under the water surface, since it requires 100% submersion while working.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eAutomatic heating without a dial\u003c\/h2\u003e\u003cp\u003eThe heater starts warming the water as soon as it is in place. There is no setting to choose and no dial to turn. It holds the water at 78°F, a temperature the manufacturer lists as suitable for betta and most tropical fish.\u003c\/p\u003e\u003cp\u003eA light on the unit shows what it is doing: red while it is heating, green once it has stopped. That gives a quick visual check of the current state without opening anything.\u003c\/p\u003e\u003ch2\u003e25W of power in a small tank\u003c\/h2\u003e\u003cp\u003eAt 25W, this is a low-wattage heater intended for small volumes, matching the 1 to 5 gallon tank range the manufacturer states. The quartz glass body and the rubber sealing layer are the two materials named for the housing.\u003c\/p\u003e\u003ch2\u003eSubmersion and setup of the heater\u003c\/h2\u003e\u003cp\u003eThe unit has to be fully underwater when it runs, so no part of it should sit above the waterline. There is nothing to adjust after placement: the heater takes over the temperature work itself and holds 78°F.\u003c\/p\u003e\u003ch2\u003eWhat comes with the heater\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOne DaToo 25W heater\u003c\/li\u003e\n\u003cli\u003eOne thermometer sticker\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuestions buyers ask about this mini fish tank heater\u003c\/h2\u003e\u003ch3\u003eHow many gallons does a 25W heater cover here?\u003c\/h3\u003e\u003cp\u003eThe manufacturer gives 1 to 5 gallons for small fish tanks and 1 to 6 gallons for desktop glass or acrylic aquariums.\u003c\/p\u003e\u003ch3\u003eDoes the heater need to be fully underwater?\u003c\/h3\u003e\u003cp\u003eYes, the directions state 100% submersion in water whenever the heater is in use.\u003c\/p\u003e\u003ch3\u003eWhat temperature does it hold the water at?\u003c\/h3\u003e\u003cp\u003eIt heats the water automatically and holds it at 78°F, with no setting required.\u003c\/p\u003e\u003ch3\u003eWhat do the red and green lights mean?\u003c\/h3\u003e\u003cp\u003eThe red light is on while the heater is warming the water, and the green light is on when it has stopped heating.\u003c\/p\u003e\u003ch3\u003eIs a thermometer included?\u003c\/h3\u003e\u003cp\u003eA thermometer sticker is included with the heater.\u003c\/p\u003e\u003ch3\u003eWhat is the heater body made of?\u003c\/h3\u003e\u003cp\u003eThe body is quartz glass with a rubber sealing layer instead of a plastic seal.\u003c\/p\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eDaToo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWattage\u003c\/th\u003e\n\u003ctd\u003e25W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eQuartz glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIncluded components\u003c\/th\u003e\n\u003ctd\u003eThermometer sticker\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"DaToo","offers":[{"title":"Default Title","offer_id":44480580517951,"sku":null,"price":28.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/2409\/1199\/files\/datoo-aquarium-heater-25w-2.jpg?v=1794772069","url":"https:\/\/dogjointly.com\/products\/dattoo-25w-mini-aquarium-heater","provider":"DogJointly","version":"1.0","type":"link"}