The Hagen Marina Standing Aquarium Thermometer is an accurate, easy to read temperature indicator for fresh and saltwater fish tanks. Includes a safety zone indicator that applies to most tropical fish and helps protect your fish from unsafe temperatures. Standing thermometer for fresh or saltwater use Accurate and easy to read Safety zone indicator for most tropical fish Thermometer Dimensions: 0.5"L x 3.8"W x 7"H Protecting your fish from unsafe temperatures is critical to their long-term health and vitality. In fact, many tropical fish can only survive within a very specific temperature range. This thermometers "green zone" is especially highlighted to make it easy for you to maintain a safe, healthy heat level for your aquatic pets.Note: The Standing Thermometer stands freely in the tank and does not require a suction cup.
