Features: Provides accurate … This heater provides accurate temperature control that will help keep your aquatic companions happy and healthy in their habitats. Only at PetSmart. Get It Today. Looks like the Top fin is more accurate at the upper end of the range. … Pick Up In-Store: Sort & Filter. Wireless & Extended Range Thermometers. 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 … Thermometers & Thermostats 1 - 9 of 9 results. 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. Sort By. Make your aquarium even better with Top Fin's Submersible Aquarium Heater. 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 … Imagitarium Aquarium Strip Thermometer (80) $1.39 was $1.99 JW Pet Magnet Smart Temperature Aquarium Thermometer …