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  • Varrox- Heavy Duty Oxalic Acid Vaporizer

Varrox- Heavy Duty Oxalic Acid Vaporizer


Product Description

Looking to treat Varroa & Trachael Mites in your hive, look no further. When using the Varrox Vaporizer with the Oxalic Acid you can effectively kill the adult Mites in the hive that are on the bees. The Oxalic Acid vapor will kill any adult mites that are on the bees but it will not penetrate the wax cappings to kill mites in the capped brood. The Oxalic Acid Vaporizer works best in broodless periods in the hive so as to kill the maximum amount of mites in your colonies. When used in late fall or early winter you can do a treatment when the temperatures are 40 degrees or above. 

If using the Varrox Vaporizer during the spring and summer months when brood is present you will need to do 3 consecutive treatments on the hive to get the mites that will be emerging out of the brood. Honey supers must be removed or a barrier created when using the Oxalic Acid treatment as Oxalic Acid is not approved to be used while supers are on the hive.

Useful Articles:

Randy Oliver's- Oxalic Acid: Heat Vaporization and Other Methods: Part 2 of 2

Dave Cushman's site- Instruction Manual


Usage Instructions direct from OxaVap

"What you require:

  • Oxalic Acid crystals
  • Oxalic Acid vaporizer
  • Timer
  • Measuring spoon for crystals
  • Mask approved for Oxalic Acid fumes, one type from 3M is OV/N95
  • Acid resistant gloves
  • Eye protection
  • Cloths or foam to block entrances

Safety first

  • Always wear your mask, eye protection and gloves, you don’t want to breathe the vapors from the vaporizers. Breathing the fumes can cause severe irritation and burns to the throat.
  • Avoid skin contact with the crystals as OA can cause a burning sensation.
  • Always keep a smoker lit and stand up-wind.


    1. Add 1 gram per brood box, no matter the brood box size, of Oxalic Acid crystals to the head (pan) of your Oxalic Acid Vaporizer. You can use a ¼ of a teaspoon (which is the equivalent of one gram) as a measuring tool. For example, a colony with two brood boxes requires 2 grams for treatment or ½ a teaspoon. For a nuc box, you would use ½ a gram.
    2. Insert the vaporizer about ½ to ¾ of the way into hive from the front entrance.
    3. Seal any openings with cloths or foam.
    4. Don your respirator.
    5. Connect your vaporizer to the power source (12 volts) for two and a half minutes (Maximum three minutes – depends on battery capacity.)
    6. Disconnect power source.
    7. Wait 2 minutes and remove the vaporizer to prepare for the next hive.
    8. Reseal the hive a further ten minutes. If you wish, you can leave the vaporizer inside the hive for the full ten minutes (after disconnecting from the power source after the initial 2.5 minute connection.)
    9. Removed all cloths or foam.
    10. Ensure the vaporizer is cooled down before reusing or storing. If you have the Varrox model, you can dunk it in water. With the Varrocleaner or VarroVap, use a wet cloth.

What’s next?

  1. If you have brood repeat these steps every 7 days for three weeks. A total of three treatments are required, as the vapor doesn’t kill mites in the capped brood cells and you need to vaporize those mites as they emerge with the brood during this time frame.
  2. If you have a broodless period then only one treatment is required."

Product Videos

Varrox Vaporizer 03:04

How to use the Vaporizer

  • Varrox Vaporizer
    How to use the Vaporizer

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