Provides stable temperature by recirculating aquarium water continuously around heater element. Clear cap to view "On" light of heater. Overflow pipe automatically vents air from chamber for safe operation. Aquarium heater is not included with module.
Provides unequalled temperature control and adds the convenience of not having a heater in the aquarium. Accepts one standard 3/4" or 1" diameter glass tube heaters (not included). Clear cap permits viewing of heater "on" light.