A new generation of aquarium heaters with an impact resistant plastic housing and an extremely precise electronic thermostat. The heater is adjusted by an extremely convenient ONE-TOUCH system consisting of a single button and a wreath of LEDs indicating the current and programmed temperature. The electronic thermostat works with exceptional precision of +/- 0.25 ? C, maintaining a constant temperature in the aquarium, which ensures thermal comfort even for the most sensitive species of aquarium animals. The temperature control range is in the range of 20 to 33 ? C, which allows the use of the heater to treat many fish diseases, e.g. \"Smallpox\". ULTRA HEATER also has a built-in system to prevent water overheating in hot weather. An unbreakable plastic housing makes from the ULTRA HEATER heater are perfect for tanks with large, strong fish and even water turtles. At the same time, they are completely safe and do not burn the inhabitants of the aquarium, even as sensitive as armor or rays.