A complete indoor heating system - no plumbing and surprisingly inexpensive.
For Koi quarantine tanks as a rule of thumb 1kw will heat 1000gall depending on insulation, surface area and room temperature. Features:-
Audible alarm sounds when water level around the heater is too low. Heater automatically shuts down when the water level is too low.
External temperature adjustment with setting scale in DegC. Neon indicators for mains power and heater on.
Temperature range adjustable between 16 C & 32C (60F & 90F). Low voltage electronic probe accurate to + or - 0.5 C.
Solid state electronic circuit gives superior accuracy and reliability. Heater element length approx 12"
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