Hydor Theo UL Aquarium Heater 50 watts

    Hydor Theo UL Aquarium Heater 50 watts

    SKU: T11102
    Regular Price: $33.99Sale Price: $17.49
    One Time Order

    Autoship & Save!    [MORE DETAILS]

    Item is no longer available

    If you like, we can email you the moment we receive a new shipment.




    You will be notified when the product is back in stock.
    Thank you for your patience.

    Sincerely, Everyone at EntirelyPets!

    Keep Shopping


    This item has been discontinued. We recommend trying Tetra HT10 Submersible Heater 50 Watt (2-10 Gal)

    Hydor Theo - Super Safe, Shatter Proof Heating

    Control your aquarium's temperature safely and precisely with the THEO aquarium heater. The THEO is suitable for marine and tropical aquariums. The THEO heater can be positioned in any way: vertically, horizontally, or submerged. High quality components are used, including a shatter proof glass tube and a patented PTC heating system that guarantees safety and shock resistance.

  • Highly precise aquarium thermometer
  • Shatter Proof, Shock Resistant
  • Top

    Usage Information

    Caution: before placing your hands inside the tank, disconnect all electrical appliances from the mains.
  • Check the voltage to verify that the one reported on the heater label corresponds to your electrical supply mains.
  • Fix the suction cups supplied to the heater.
  • Place THEO in the tank in an area which enjoys good water circulation, as this will assure even heat distribution and most effective heater operation.
  • Place the suction cups on the previously cleaned glass and press firmly.
  • In order to ensure that heater works properly, you should be careful not to let the level of the water, in case of vertical positioning, drop below the "WATER LEVEL - TAUCHTIEFE - NIVEAU D'EAU - LIVELLO DELL'ACQUA" line.

  • In order to set the heater, turn the knob until the temperature indicator corresponds to the required temperature value.
  • Connect the heater to the supply mains and wait a few minutes, allowing it to adapt to the temperature of the water.
  • Should the water temperature turn out to be lower than the value set on the graduated scale, THEO starts working automatically, and the light comes on and remains lit while the heater is in operation.
  • Once the set temperature is reached, THEO will maintain it automatically

  • This heater is only intended for indoor use.
  • Check voltage to verify the one reported on heater label corresponds to your electrical supply.
  • Do not connect to mains when out of water.
  • Do not use if either the cable or the heater are damaged.
  • Always disconnect all immersed electrical equipments from mains before placing your hands in water.
  • Water level must be kept at or above the "WATER LEVEL - TAUCHTIEFE - NIVEAU D'EAU - LIVELLO DELL'ACQUA" indication line.
  • Top

    Customer Reviews

    DISCLAIMER: The results described on the testimonials on this site, are the individual experiences and personal opinions of those who have purchased and used the products. These testimonials are not intended to make any claims that the products can be used to diagnose, treat, mitigate, cure or prevent any disease or medical condition.

    Questions and Answers

    VetriScience Derma-Strength Mini Bite-Sized Chews (60 count)Derma-Strength Mini (60ct)
    Reg price: $14.99
    Sale price: $10.99
    Ourpet's Play-N-Squeak Tail Spin TeaserTail Spin Teaser
    Reg price: $27.99
    Sale price: $20.99
    Animals' Apawthecary VitaminsAnimals' Apawthecary Vitamins
    Thomas Labs Super 12 5000 Powder (16 oz)Thomas Labs Super 12 5000 Powder (16 oz)
    Reg price: $15.99
    Sale price: $12.69

    Security Seals
    EntirelyPets.com, Pet Supplies & Foods  Retail, Union City, CA


    ~ My Account Login ~

    Sign into your EntirelyPets Account for the best experience!