How do I make a Terrarium Fogger?


  1. Ultrasonic Humidifier. These are the cool mist humidifiers. Other humidifiers heat up water to create mist which will increase the heat in the vivarium or could burn your frogs.
  2. PVC reducer. Needs to be large enough to fill the hole in the humidifier. It should reduce to 1/2 inch. I use a 2 in to 1/2 inch reducer.
  3. Plastic tubing. With a 1/2 inch connectors you would use 5/8 tubing.
  4. PVC fitting. This will be the access point on the vivarium. With 5/8 tubing you use a 1/2 inch fitting.
  5. Timer – Used to set up a misting cycle.




Gather supplies

Ebay is a great place to find cheap ultrasonic humidifiers. PVC supplies are typically cheaper at your hometown hardware store than at Home Depot or Lowes.

Take cap off of Humidifier


Insert PVC Reducer into Ultrasonic Humidifeir

If it doesn’t fit exactly, you can use 100% silicone to make a sure fit.

Attach tubing to the reducer


Run tubing from Humidifier to the tank

You do not want any point of the tubing to lower than the point at which the tubing meets the tank (sagging). Condensation will form in the tube. If there is sagging in the line, the condensation will gather at the lowest spot and block fog from going through the tubing.

Attach fitting to vivarium

Can either be siliconed to the screen or drilled into glass lid or side.

Attach tubing to the fitting


Set timer

2-3 times a day max. You want to allow things to dry out in between foggings. You only need the fogger on for a couple of minutes. A few minutes is more than enough to fill the whole tank with fog.




Fog isn’t making it to my tank

  • Make sure there are no leaks at any of the connections. You can use 100% silicone to seal any leaks.
  • Make sure there are no sags in the tubing. Condensation will gather at the sag and clog the fog.
  • Make sure there are no cracks in the water reservoir on the humidifier. 100% silicone can fix the cracks.
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