Hailea Budget water heaters available in 100 watt, 200 watt and 300 watt versions to suit all sizes of reservoir.
100 watt budget water heater -- upto 150 litre reservoir
200 watt budget water heater -- upto 260 litre reservoir
300 watt budget water heater -- upto 450 litre reservoir
Also available is a plastic cage to put these heaters in to guarantee they sit at the bottom of your tank. Please note that if these water heaters are exposed to air, ie. your tank level runs to low they will break.