![Amazon.com: PULACO 25W Small Aquarium Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks (Preset Temperature 78℉) : Pet Supplies Amazon.com: PULACO 25W Small Aquarium Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks (Preset Temperature 78℉) : Pet Supplies](https://m.media-amazon.com/images/I/61PrJ9gAPSS._AC_UF1000,1000_QL80_.jpg)
Amazon.com: PULACO 25W Small Aquarium Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks (Preset Temperature 78℉) : Pet Supplies
![Amazon.com : SunGrow Betta Fish Tank Thermometer Stick On, Aquarium Temperature Sticker Strip, 5.2 x 0.7 Inches, Green & Blue Temperature Indicator, Amphibian and Reptile Thermometer Sticker, Black, 1 Pc : Pet Supplies Amazon.com : SunGrow Betta Fish Tank Thermometer Stick On, Aquarium Temperature Sticker Strip, 5.2 x 0.7 Inches, Green & Blue Temperature Indicator, Amphibian and Reptile Thermometer Sticker, Black, 1 Pc : Pet Supplies](https://m.media-amazon.com/images/I/71ok6e5IhzL.jpg)
Amazon.com : SunGrow Betta Fish Tank Thermometer Stick On, Aquarium Temperature Sticker Strip, 5.2 x 0.7 Inches, Green & Blue Temperature Indicator, Amphibian and Reptile Thermometer Sticker, Black, 1 Pc : Pet Supplies
![Amazon.com : SunGrow Digital Betta Thermometer, Yellow Color, Accurately Reads Aquarium Temperature, with 2 Suction Cups, 1-Pack : Pet Supplies Amazon.com : SunGrow Digital Betta Thermometer, Yellow Color, Accurately Reads Aquarium Temperature, with 2 Suction Cups, 1-Pack : Pet Supplies](https://m.media-amazon.com/images/I/71Q8ajMsE5L._AC_UF1000,1000_QL80_.jpg)
Amazon.com : SunGrow Digital Betta Thermometer, Yellow Color, Accurately Reads Aquarium Temperature, with 2 Suction Cups, 1-Pack : Pet Supplies
![Betta Fish Tank Heater, 25W Mini Aquarium Heaters with 2 Artificial Plants 1 Stick-on Thermometer Strip Energy-efficient Water Warmer Temperature Controller Smart Thermostat for 3-5 Gallon Tank Black Betta Fish Tank Heater, 25W Mini Aquarium Heaters with 2 Artificial Plants 1 Stick-on Thermometer Strip Energy-efficient Water Warmer Temperature Controller Smart Thermostat for 3-5 Gallon Tank Black](https://www.gosupps.com/media/catalog/product/cache/25/image/1500x/040ec09b1e35df139433887a97daa66f/5/1/51VdEp3BDYL.jpg)
Betta Fish Tank Heater, 25W Mini Aquarium Heaters with 2 Artificial Plants 1 Stick-on Thermometer Strip Energy-efficient Water Warmer Temperature Controller Smart Thermostat for 3-5 Gallon Tank Black
![Amazon.com : SunGrow Digital Betta Thermometer, Yellow Color, Accurately Reads Aquarium Temperature, with 2 Suction Cups, 1-Pack : Pet Supplies Amazon.com : SunGrow Digital Betta Thermometer, Yellow Color, Accurately Reads Aquarium Temperature, with 2 Suction Cups, 1-Pack : Pet Supplies](https://m.media-amazon.com/images/I/61qY+xbrVQL._AC_UF1000,1000_QL80_.jpg)
Amazon.com : SunGrow Digital Betta Thermometer, Yellow Color, Accurately Reads Aquarium Temperature, with 2 Suction Cups, 1-Pack : Pet Supplies
![Amazon.com : SunGrow Betta Fish Tank Thermometer Stick On, Aquarium Temperature Sticker Strip, 5.2 x 0.7 Inches, Green & Blue Temperature Indicator, Amphibian and Reptile Thermometer Sticker, Black, 1 Pc : Pet Supplies Amazon.com : SunGrow Betta Fish Tank Thermometer Stick On, Aquarium Temperature Sticker Strip, 5.2 x 0.7 Inches, Green & Blue Temperature Indicator, Amphibian and Reptile Thermometer Sticker, Black, 1 Pc : Pet Supplies](https://m.media-amazon.com/images/I/617vZTIjaLL.jpg)
Amazon.com : SunGrow Betta Fish Tank Thermometer Stick On, Aquarium Temperature Sticker Strip, 5.2 x 0.7 Inches, Green & Blue Temperature Indicator, Amphibian and Reptile Thermometer Sticker, Black, 1 Pc : Pet Supplies
![Amazon.com: Marina Floating Thermometer for Betta Fish Tank with Suction Cup, Aquarium Thermometer, 11201A1 : Everything Else Amazon.com: Marina Floating Thermometer for Betta Fish Tank with Suction Cup, Aquarium Thermometer, 11201A1 : Everything Else](https://m.media-amazon.com/images/I/81kPG87+wXL.jpg)
Amazon.com: Marina Floating Thermometer for Betta Fish Tank with Suction Cup, Aquarium Thermometer, 11201A1 : Everything Else
![My friend's betta sits half out of water on top of the thermometer. Is this abnormal? (Dark picture, kind of hard to see the betta) : r/Aquariums My friend's betta sits half out of water on top of the thermometer. Is this abnormal? (Dark picture, kind of hard to see the betta) : r/Aquariums](https://external-preview.redd.it/CJeUhg__JLp8HzqSfgjRD46IVvJvus0GwmrkambCDfs.jpg?auto=webp&s=90f6d396b6e5d49862e5b00d7288fd4e2b3d7883)