They go above the tank like a light. I bought an Exo Terra Porcelain Clamp Lamp (small) and an Exo terra lamp holder bracket (both available on Amazon).

I cut the wire casing on the lamp clam cage so the ceramic heater heater can sit closer to the tank top without exposing the CHE itself. I think positioned the Bracket so that it would hold the lap as close to the top as possible.

I like the bracket because it secures the heat source in place and you won't accidentally knock it over or have it fall off.


I also use the ZooMed HydroTherm to control the heat. It will turn the heat course on and off through out the day to maintain the desired temp. I may also be wrong, but the CEH will create a natural hot spot right below it in a 20G tank and then the rest of the tank will be heated to the desired setting. I would measure the temps of the enclosure on the opposite side of the tank from the heat sours to ensure the whole area is within a comfortable range.

I'll take a picture of my heater setup when I get home for lunch today and post it up for you.