Moisture in the hive

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Steve Messman

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Oct 19, 2025, 6:51:24 PMOct 19
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Just a thought and a question. Has anyone ever tried using a moisture desicant (like Dry Rid) inside a hive--for example inside the quilt box? Why or why not?

Steve Messman

Matt Dickey

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Oct 20, 2025, 10:41:03 AMOct 20
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There's nothing inherently wrong with something like damp rid given it is just calcium chloride that becomes a salt solution when converted by water. Your struggle is having to replace and/or refill the calcium chloride and that your are fighting trying to dehumidify a non-closed system in the PNW in winter... It only absorbs 300% of its own weight. That being said, it has been on my list to try with one of my hives next year. In a closed system it can take ambient humidity in a room from 80 to 40% in about 3 days. I want to see how long it would take until fully saturated on a hive and plot the curve. 

The thing I'm not entirely sure on is any stray calcium cloride toxicity or possible HCL and/or calcium hydroxide vapor byproducts from interactions with moisture in a confined space. 

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Vivian Johnson

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Oct 20, 2025, 12:44:04 PMOct 20
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I found this blog site on a desiccant manufacturer’s web page regarding desiccants and have pasted their response to using desiccants in hives.  I could not find any research done in this area.  If you do experiment with desiccants it would be great to know your methodology and results.

What are the potential benefits and risks of using desiccant in a beehive?

May 19, 2025

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What are the potential benefits and risks of using desiccant in a beehive


As a desiccant supplier, I've had numerous inquiries about the use of desiccants in beehives. Beekeeping is a delicate and complex practice, and the idea of introducing desiccants into the beehive environment is both intriguing and controversial. In this blog, I'll explore the potential benefits and risks associated with using desiccants in a beehive.

Potential Benefits

Moisture Control

One of the primary benefits of using desiccants in a beehive is moisture control. Bees generate a significant amount of moisture through respiration and the evaporation of nectar. Excess moisture in the hive can lead to a range of problems, including the growth of mold and fungi, which can be harmful to the bees and their brood. Desiccants, such as silica gel, can absorb moisture from the air inside the hive, helping to maintain a dry and healthy environment.

Silica gel is a popular choice for beehive desiccants because it is non-toxic, odorless, and has a high capacity for moisture absorption. Our Small Food Safe 2 Gram Silica Gel Packets are specifically designed to be safe for use in food storage and can also be used effectively in beehives. These small packets can be placed strategically inside the hive to absorb moisture and prevent the buildup of humidity

Potential Risks


Bee Health Concerns

While desiccants can help control moisture in the beehive, there are concerns about their potential impact on bee health. Some desiccants, such as calcium chloride, can be toxic to bees if ingested. Even non-toxic desiccants, such as silica gel, can pose a risk if bees come into direct contact with them.

Bees may mistake desiccant packets for food or water and attempt to consume them. If a bee ingests a desiccant packet, it can cause blockages in the digestive system, leading to death. To minimize this risk, it's important to use desiccant packets that are specifically designed for beehive use and to place them in a location where bees are less likely to come into contact with them.

Impact on Bee Behavior

The introduction of desiccants into the beehive environment may also have an impact on bee behavior. Bees are highly sensitive to changes in their environment, and the presence of desiccants may disrupt their normal behavior patterns.

For example, bees may spend more time trying to remove the desiccant packets from the hive, which can distract them from their normal tasks, such as foraging and caring for the brood. Additionally, the desiccants may alter the humidity and temperature inside the hive, which can affect the bees' ability to regulate their body temperature and maintain a healthy colony.

Cost and Maintenance

Using desiccants in a beehive can also be costly and require regular maintenance. Desiccant packets need to be replaced periodically to ensure that they continue to absorb moisture effectively. Additionally, the cost of purchasing desiccant packets can add up over time, especially for beekeepers with large colonies.

small food safe 2 gram silica gel packets Free Sample

Beekeepers also need to be careful when handling desiccant packets to avoid contamination. If desiccant packets are contaminated with pesticides or other chemicals, they can pose a risk to the bees and the environment.

Conclusion

The use of desiccants in a beehive can have both potential benefits and risks. While desiccants can help control moisture, prevent diseases, and preserve honey, they can also pose a risk to bee health, disrupt bee behavior, and be costly and time-consuming to maintain.

As a desiccant supplier, I recommend that beekeepers carefully consider the potential benefits and risks before using desiccants in their hives. If you decide to use desiccants, it's important to choose a product that is specifically designed for beehive use and to follow the manufacturer's instructions carefully.

Customized small food safe 2 gram silica gel packets

If you have any questions about using desiccants in your beehive or would like to learn more about our Small Food Safe 2 Gram Silica Gel Packets, please don't hesitate to contact us. We're here to help you make the best decision for your beekeeping operation.

References

  • Crane, E. (1999). The World History of Beekeeping and Honey Hunting. Routledge.
  • Morse, R. A., & Flottum, K. (1997). The Hive and the Honey Bee. Dadant & Sons.
  • Winston, M. L. (1987). The Biology of the Honey Bee. Harvard University Press.






From: Matt Dickey <xm.di...@gmail.com>
Sent: Sunday, October 19, 2025 9:06:12 PM
To: oba-dis...@olympiabeekeepers.org <oba-dis...@olympiabeekeepers.org>
Subject: Re: [OBA Discussions] Moisture in the hive
 

Matt Dickey

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Oct 20, 2025, 1:31:21 PMOct 20
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I could see value going with silica gel. I use the color changing silica gel for all my 3d printing filament storage projects and it is pretty easy to use given the color changing of it. Brainstorming vs the calcium chloride route, you could do mason jars with a steel mesh instead of the normal canning lid, use the color changing silica gel beads (you can buy in bulk) it would be quick and easy to see when they are fully saturated (minimizing the heat loss in the hive when swapping them. Then swap out the jars and use an old toaster oven or food dehydrator to recharge the silica gel. I don't know what the ramifications would be, but I'm now envisioning doing a half frame style with 2 layers of steel mesh and the beads in between to increase the surface area. Would be small enough to fit into a dehydrator/toaster oven and could put together a couple frames of it. I just don't know if the bees would try to probe it and if they could do anything given the 2 layers of steel mesh. may be worth still having a poly layer in between like the silica gel packet material. The jar would probably be the safer option of the two.  These are the ones I use for storage of my 3d printing filament.  https://a.co/d/3PcrNgt  Same rules as the calcium chloride... I don't know how long they would last in a non-closed system, but they are reusable unlike the calcium chloride.

Charlie Garrott

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Oct 20, 2025, 1:51:56 PMOct 20
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Have you had problems with moisture in your hives? I did my first year in beekeeping but that was due to weak colonies and uninsulated hives.

I tried quilt boxes and that helped but I have been coached that quilt boxes soak up too much precious heat from the hive.

Now I insulate my hives with 1-1/2" styrofoam insulation and insulate the top cover also. I put a corrugated plastic rain hat on the hives and tilt them forward 1" (back high).

I remove the screen on the middle hole in the inner cover that I put on in the summer to prevent robbing. I put in a 3/4" x 1-1/2" wood block between the inner cover and the top cover at the back of the hive. This lifts the back edge of the outer cover a little off the hive body and provides a small path for the warm moist air to exit the hive. The air enters at the front of the hive and slowly drifts through the frames and exits at the rear. The bees gather on top of the inner cover to bask in the warm breeze.

I keep the entrance at the bottom of the hive restricted down pretty tight and centered in the middle of the hive. I am going to build something like this that you can buy from Countryrubes.com: 

image.png
I have been told it is important to regularly clean the slider boards as the debris that accumulates absorbs moisture. I put another layer of plastic board under the hives to provide another layer of seal below the hives. My slider boards weren't tight enough to prevent drafts.

Also, putting on a candy board in say early December can absorb moisture in the hive as well as provide food. Warm up the candy board before you put it in.

I appreciate your post. Interaction inspires good thinking.

Charlie

Steve Messman

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Oct 23, 2025, 10:15:14 PM (13 days ago) Oct 23
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Well, to answer a few questions, let me begin with this is my first year. I did put an open container of Calcium Chloride in one of my quilt boxes. It does not seem to be doing an ounce of good. I have not tried silica gel. Inside my quilt boxes, I have about six layers of quilted burlap that have been cut from moving pads. There is a lot of moisture in my quilt boxes, but the burlap is absorbing that so it doesn't drip onto the bees. There is still a lot of moisture inside the box; however, but it is getting on the burlap, not the bees. I am about to make some "pillows" containing wood bedding chips to help absorb more, and probably provide better top insulation. I have a sugar board in there already. The bees seem to like that. I have the hive insulated top to bottom with 1.5 inch styrofoam, except for about the top three inches. I have an entrance reducer on the bottom board, using the larger of the two openings. My plastic bottom boards are closed. There is one hole in my quilt boxes for air circulation, plus the entire top cover is lifted about 1/8 inch in the back and 1/4 inch in the front. I only have two hives. They are entirely covered with an outdoor canopy.


Steve Messman


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