Suitable for aquariums up to 200 litres. 200 watts. Length of heater: 27.5cm. Temperature range: 20-34oC. Suitable for freshwater and saltwater aquariums. Suction cup bracket included. Easy to adjust temperature indicator. Visible power indicator lamp. With a simple to read and easy to adjust temperature indicator, operation of the Aqua One 300w heater is pleasantly effortless. The temperature scale screen offers clear readings for quick and effective use, whilst the heating component is incredibly easy to install.