Hydor Theo -Shatterproof Aquarium Heaters

One of the smallest and most compact heaters on the market.

Specially treated Shatterproof glass makes this much safer and robust than conventional heaters. Will not explode even if taken out of water whilst operational, due to an automatic overheating control system.

The heater Will then work perfectly if put back in the water. This is made possible due to our patented PTC heating film element inside the shatterproof tube.

High tech micro-switch for exceptional heater durability and excellent temperature control.

A proper temperature dial which clicks on each setting and has the temperature clearly marked on the dial area.

Completely submersible, works in both horizontal and vertical position, can even function if buried under gravel!! UL and TUV approved.