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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.
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.