PENN-PLAX Therma-Temp Floating Aquarium Thermometer – Mercury Free – Safe for Freshwater and Saltwater Fish
The essential PENN-PLAX Therma-Temp floating aquarium thermometer gives fish keepers an accurate, mercury-free way to monitor water temperature in both freshwater and saltwater tanks. Its floating design delivers true water readings rather than wall-influenced results, and the dual Fahrenheit and Celsius scale works with any care guide you follow. A reliable, safe choice for beginners and experienced hobbyists alike. Available on Amazon.