… Sort By. Pick Up In-Store: Sort & Filter. Wireless & Extended Range Thermometers. Make your aquarium even better with Top Fin's Submersible Aquarium Heater. Features: Provides accurate … This heater provides accurate temperature control that will help keep your aquatic companions happy and healthy in their habitats. Click to expand... Yeah, this is the problem... one thermometer may be more accurate at 32 degrees and the other more accurate at 99 degrees, but who knows which is the most accurate … If your device uses probes to detect temperature, inaccurate readings can be a sign that the probe is going to fail soon, and you may want to order a replacement. Thermometers & Thermostats 1 - 9 of 9 results. Only at PetSmart. SunGrow Betta Sticker Thermometer, 5.2-inch Tall by 0.7-inch Wide, Ensure Optimum Comfort Around 78 Degrees, Accurately Measures Temperature, Large Fonts for Quick Reading, 1 Minute to Set-Up, 1-Pack … Imagitarium Aquarium Strip Thermometer (80) $1.39 was $1.99 JW Pet Magnet Smart Temperature Aquarium Thermometer … Looks like the Top fin is more accurate at the upper end of the range. Get It Today.