They are extensively recognised as the most accurate and the most reliable heaterstat available. Completely submersible automatic aquarium heater. Easy and precise setting of desired temperatureThermometer-style temperature indicator is easily visibleSensitive and reliable thermostat maintains uniform temperatureHeating element is highly efficient and compactDesigned for extended use and complete safetySupplied with strong support clips and suction cups. Voted independently by the readers of Practical Fishkeeping in their last two reader surveys as the most widely used and the easiest to adjust heaterstats on the market.The full range stocked is as follows:25w Model - Length of heater - 15cm Minimum 12 litre/Maximum 25 litre50w Model - Length of heater - 15cm Minimum 25 litre/Maximum 50 litre 75w Model - Length of heater - 25cm Minimum 40 litre/Maximum 75 litre100w Model - Length 25cm Minimum 50 litre/Maximum 100 litre 150w Model - Length 30cm Minimum 75 litre/Maximum 150 litre 200w Model - Length 30cm /Maximum 200 litre 250w Model - Length 35cm /Maximum 250 litre 300w Model - Length 35cm /Maximum 300 Litres 25 50 75 100 150 200 250 300 5ºC 9ºF 25w 50w 50w 75w 100w 150w 200w 250w 10ºC 18ºF 25w 50w 75w 100w 150w 200w 250w 300w 15ºC 27ºF 75w 100w 150w 200w 300w 2x 200w 2 x 250w 2 x 300w Temperature shown in red box is the difference between the aquarium temperature required and the room temperature where it is situated
