Fogponics FAQ: Mist Maker Setup for Fogponic Growing

Choosing the right ultrasonic mist maker size for fogponics growing can be tricky because every setup is unique. It’s harder to judge fog output visually compared to water volume contained in the fog. For 100% fogponic grows, a common mistake is buying an undersized mist maker that doesn’t produce enough dense fog to properly nourish plants. The fog needs to be very thick for effective nutrient/moisture delivery.

Since it’s challenging to recommend one exact model, the best advice is to buy the largest mist maker you can comfortably afford. Here’s why:

• Larger mist makers generate fog quickly, minimizing required run times. It also increases the fog to air ratio.
• The goal is minimum air flow with maximum fog production.
• Shorter run times keep water temperature lower, protecting the unit and maintaining air temps in your root zone.
• For thick fog, run the fan at a low speed to push dense fog into the root zone without excessive fog dilution.
• Using a smaller fan, like an 80mm waterproof fan is ideal for fogponics, creating just enough airflow to move the fog. Larger fans like 120mm often over-dilute the fog unless you have a very large grow area.

Optimizing your mist maker size and fan setup ensures your plants get consistent, dense fog for healthy root absorption and improved growth in fogponics systems.

For 100% fogponic grows with multiple growing sites, a 9 to 12 disc ultrasonic mist maker is typically recommended to ensure dense, consistent fog coverage throughout your system. Larger units deliver enough fog to effectively nourish your plants and promote healthy root development.

If you use a water chiller or a large reservoir that allows longer run times, or if you grow using a hybrid method—such as a combination of fog with shallow Deep Water Culture (DWC), Nutrient Film Technique (NFT), or the Kratky Method—you can opt for smaller mist makers. These methods submerge about 25% of the root zone in nutrient water, with the top 75% benefiting from fog, requiring less fog output overall. You can use a smaller unit with this method. Typically, a 3-5 disc for multiple sites, or a single disc for a 5 gallon bucket type grow.

To find the ideal cycle times for your fogponics system, start by running your ultrasonic mist maker until the fog in the root zone reaches its maximum density. This duration is your system’s “on-time.” Next, turn off the mist maker and observe how long it takes for most of the fog to dissipate—this is your “off-time.”

Using these initial on/off durations as a baseline allows you to fine-tune the fog cycles for optimal root hydration without over-saturating. Since every fogponics setup varies due to factors like grow space size, humidity levels, and plant types, it’s challenging to provide exact cycle times. However, this method gives you an effective starting point.

Regularly monitoring root zone moisture and adjusting cycle times helps ensure your plants receive consistent, dense fog essential for healthy growth in fogponics systems.

Using an ultrasonic mist maker for cloning is simple and effective, especially for small cloning setups. Typically, a single disc mist maker is sufficient to create the ideal fog environment for root development.

Keep in mind that fog is heavier than air, so you may need to raise the water level in your reservoir to keep the fog concentrated around the root zone. This ensures cuttings receive consistent humidity to promote fast and healthy root growth.

For a simple setup, it's as easy as adding about 4 gallons of water to a 5g bucket and dropping in a single disc unit. You can then use neoprene discs placed in holes in the lid to support your cuttings. This will hold the bottom of the cuttings in the fog, allowing for rapid root generation on your clones.

See a video of a fogponic cloning machine.

The Kratky Fog Method combines the simplicity of the Kratky hydroponic technique with the innovation of fogponics to optimize plant root health and growth.

In this method, a fogger introduces dense, nutrient-rich fog to the upper two-thirds of the plant’s root ball, while the bottom one-third remains submerged in nutrient solution. This hybrid setup supplies roots with both moisture and oxygen in an energy-efficient, passive growing environment.

Because only the top part of the roots requires fog exposure, you can use a smaller mist maker unit compared to full fogponic systems. This makes it a great way for growers to start experimenting with fogponics while leveraging the simplicity of the Kratky method.

The Kratky Fog Method offers a low-maintenance, effective way to deliver nutrients and oxygen to roots, encouraging fast growth and healthier plants.

Making your own Nutramist fogponics system is easy and budget-friendly. Here’s a simple guide to get started:

• Find an airtight container like a 5-gallon bucket as your main reservoir.
• Drill a hole for a small waterproof fan to provide airflow and one for your fog output hose.
• For nutrient supply, create a separate external reservoir (another 5-gallon bucket works well) connected by a mini float valve that maintains the water level in the main unit automatically.
• Place your ultrasonic mist maker disc inside the main reservoir at the correct water level for optimal fog production.
• Connect the fan and fog output with tubing to direct dense, nutrient-rich fog to your root or cloning chambers.

This DIY setup provides a versatile, efficient fogponics environment ideal for cloning, propagation, or growing various plants with focused root zone humidification.

For a detailed step-by-step visual walkthrough, watch our DIY Nutramist / Fogponics setup video showing all components and assembly tips.

Making a Vertical Fogponics Tower is an easy and innovative way to start growing with fogponics. The simplest approach is the 5-Gallon Bucket Hybrid Kratky Method, which combines passive nutrient delivery with fog misting.

One key thing to remember with vertical towers is that fog is heavier than air and tends to settle at the bottom. Because of this, fog needs to be introduced at the top of the tower, not the bottom, to ensure proper circulation.

A popular design is a hybrid drip/fog system where the ultrasonic mist maker is mounted at the top (without the black float) in an overflowing container fed by a nutrient pump at the bottom of the tower. Nutrient solution pumps up, feeds the fogger, then overflows down the roots, returning to the reservoir.

Depending on the tower size, you can use anywhere from a single disc mist maker up to a 12 disc unit. Some customers use a single disc fogger that pumps nutrients to the top, producing dense fog that nourishes roots between pump cycles.

Because the tower is a hybrid — the drip system feeds the roots while the fog adds moisture and oxygen at the root zone — you don’t need a large unit. Match the fogger to your tower: a single-disc unit handles a small tower, stepping up to a larger unit for taller towers with more grow sites.

To learn more, check out our video on building a DIY Vertical Fogponics Tower and see detailed diagrams for assembly.

Yes! The water droplets created by a mist maker will carry everything dissolved in the reservoir water—including minerals, nutrients, and antifungal treatments. Unlike humidifiers that heat water and may affect nutrient delivery, mist makers use ultrasonic vibrations to create a fine, nutrient-rich fog. It is possible that nutrients that are not water-soluble will not be transported. It's recommended to use additives that are water-soluble. Things like organic fertilizers that have gritty particles will not transport in the fog.

This makes mist makers ideal for applications like fogponics growing, anti-fungal, and sterilization, where you want nutrients or treatments delivered directly to roots or plant surfaces. You can even treat for things like spider mites with a mist maker. The fine fog ensures excellent absorption and effective distribution of fertilizers and antifungals, helping plants thrive.