Hydor THEO Submersible Aquarium Heaters
Hydor
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  • Notes

    The Hydor THEO Heater line features PTC patented thermal technology which makes it among the safest aquarium heater lines on the market. UL listed by design, not by the use of accessories. Made from specially engineered shatterproof glass which, while not unbreakable, is designed to resist breakage in most normal aquarium situations. Highly accurate due to the use of precise micro-switch technology. For use in freshwater and marine aquariums.

    The 25W/50W & 100W/150W models, at 7" & 8.9" respectively, are among the smallest sized heaters on the market. The Theo "minimum water line" requirement must be followed for proper operation.

    Manufacturer Warranty: 2-year from date of purchase.

  • Item Description Price Quantity
    Hydor THEO Submersible Aquarium Heaters
    25 watt
    Dimensions: 7" X 1.5" / for 2-7 gal aquariums 
    $21.99

    Hydor THEO Submersible Aquarium Heaters
    50 watt
    Dimensions: 7" X 1.5" / for 5-14 gal aquariums 
    $22.99

    Hydor THEO Submersible Aquarium Heaters
    100 watt
    Dimensions: 8.9" X 1.5" / for 14-26 gal aquariums 
    $23.99

    Hydor THEO Submersible Aquarium Heaters
    150 watt
    Dimensions: 12" X 1.5" / for 23-40 gal aquariums 
    $24.99

    Hydor THEO Submersible Aquarium Heaters
    200 watt
    Dimensions: 12" X 1.5" / for 26-53 gal aquariums
    $25.99

    Hydor THEO Submersible Aquarium Heaters
    300 watt
    Dimensions: 15.5" X 1.5" / for 53-80 gal aquariums 
    $29.99

    Hydor THEO Submersible Aquarium Heaters
    400 watt
    Dimensions: 15.5" X 1.5" / for 80-105 gal aquariums
    $32.99