(2) Hydor Theo 50 watt Heaters used for 1 week. These can be tucked away inside some HOB filters so they are great for small tanks. $25 shipped.
- Maximum security: THEO is shock resistant thanks to the PTC heating element and the shatterproof glass tube
- Patent pending PTC heating system to avoid damage in case of dry running
- Free positioning in aquarium with supplied suction cups
- Self-limiting: the patented PTC heating system guarantees operation in complete safety because in case of dry running there is no danger for damage
- Temperature range: 70-94 degrees Fahrenheit
- Fits in rear filtration chambers
- 120V AC UL listed USA PLUG
- Included 5-1/2 ft cord
- Easy adjustment, knob clicks every degree!
- 7" Tall
- 5-14 gallons aquarium size
- Fully submersible or semi submersible (shows water level line)