Under Gravel Slim Heater – Hydor

Details Description Helps increase the water temperature of pico aquariums by a few degrees. 100% safe No glass components Easy maintenance Submersible Under gravel Cord connection at 90 degrees to heater Specifications 4 watt: For 1 to 2.5 gallon tanks Heater is round with approx. 9cm (3.5″) diameter Elevates water temperature by approx. 5 to 10 degrees F 7.5 watt: For 2 to 5 gallon tanks Round:9cm (3.5″) diameter Elevates water temperature by approx. 5 to 10 degrees F 15 watt: For5 – 10gallon tanks Round: 8cm Elevates water temperature by approx. 5 to 10 degrees F