Good Day: I have a brand new in box heater for sale. Highly accurate. For freshwater or saltwater. Cobalt Aquatics Neo-Therm 50 Watt Aquarium Heater The Cobalt Aquatics Neo-Therm electronic heaters have an impressive accuracy of ±0.5ºF. The electronic thermostat has an ultra-fast response time that helps to keep the temperature stable. The slim profile is great for nano aquariums and crowded sumps. The shatter-proof outer casing also makes it extremely safe. The Neo-Therm heater packs many high-end features at a reasonable price. Features Ultra-Accurate electronic thermostat ±0.5ºF For tanks up to 12 Gallons Modern, super flat design Easy to set "one touch" system LED displays both Set Temp and Tank Temp simultaneously Set temperature range up to 96ºF Thermal protection circuitry 3-year manufacturer`s warranty Made in Europe Dimensions: 6 5/8" x 2 1/4" x 3/4"