1. Introduction
Thank you for choosing the MARS HYDRO Plant Humidifier 15L. This ultrasonic humidifier is designed to provide precise and consistent humidity levels for your plants in various environments, including grow tents, indoor planting areas, greenhouses, and bedrooms. Its advanced features ensure optimal conditions for plant growth and overall comfort. Please read this manual thoroughly before operation to ensure proper use and maintenance.
2. Product Overview & Key Features
The MARS HYDRO Plant Humidifier 15L offers a range of features to enhance your plant care experience:
- Adjustable Humidity Levels: Customize humidity from 35% to 95% in 5% increments, with 1-4 fog volume levels. Flexible telescopic hoses ensure precise mist distribution.
- Precise Monitoring with Sensor Probe: An included sensor probe accurately monitors temperature and humidity, providing real-time environmental data.
- Convenient Timer Function: Set the humidifier to operate for specific durations with the built-in 12-hour timer.
- Large Water Tank Capacity: The generous 15L tank provides continuous mist output for up to 29 hours, reducing the need for frequent refills.
- Silent Operation: Operates at sound levels below 40 dB, ensuring a peaceful and undisturbed environment.
- User-friendly Moveable Design: Equipped with bottom casters and side handles for easy movement and positioning.
- Opaque Water Tank: The black opaque tank design helps prevent algae buildup, ensuring clean moisture for your plants.

Image: The MARS HYDRO 15L Humidifier providing mist inside a grow tent, illustrating its application for indoor plant cultivation.

Image: The humidifier showcasing its flexible hose and quad nozzle attachments for precise and even humidity distribution.

Image: Close-up view of the humidifier's bottom casters and side handles, highlighting its portable design.

Image: A comparison showing a transparent humidifier tank prone to algae buildup versus the opaque tank of the MARS HYDRO humidifier, designed to keep water clean.
3. Package Contents
Please ensure all items are present in the package:

Image: The MARS HYDRO 15L Humidifier shown with all its components, including hoses, nozzles, remote control, and sensor probe.

Image: A graphic detailing the contents of the humidifier package, including the humidifier unit, power cord, various pipes and nozzles, remote control, wired sensor probe, velcro straps, and a cleaning/fixing kit.
- Humidifier Unit (11.81"D x 9.05"W x 22.95"H)
- Power Cord (98.43")
- Long Straight Pipe x 1 (13.78")
- Flexible Long Hose x 2 (15.75" to 61.81")
- Flexible Short Hose x 4 (9.45" to 31.5")
- Remote Control x 1
- Wired Sensor Probe x 1 (138.58")
- 4-way Nozzle x 1
- 3-way Nozzle x 1
- 2-way Nozzle x 1
- Short Straight Pipe x 4 (5.12")
- Quad Directional Nozzle x 1
- Velcro straps x 3
- Cleaning and Fixing Kit x 1
4. Setup
- Placement: Place the humidifier on a horizontal, stable, and dry surface. Ensure it is not placed directly on carpet or other absorbent materials that could block the air inlet.
- Fill Water Tank: The humidifier features a top-fill design for easy refilling. Simply open the top lid and pour clean, cool water directly into the 15L tank. Do not exceed the maximum fill line.
- Attach Hoses and Nozzles: Connect the flexible hoses and desired nozzles (e.g., 4-way, 3-way, 2-way, quad directional) to the humidifier's mist outlet. Ensure all connections are secure. When routing hoses, avoid creating low points where condensation can collect and block mist flow. Hoses should ideally be sloped upwards from the humidifier to the mist output area to allow any condensation to drain back into the unit.
- Position Sensor Probe: Place the wired sensor probe in the area where you want to monitor humidity and temperature. Ensure it is not directly in the path of the mist for accurate readings.
- Power Connection: Plug the power cord into a suitable electrical outlet.
5. Operation

Image: The digital control panel of the humidifier displaying current temperature and humidity, along with settings for mist, timer, and humidity adjustment.
- Power On/Off: Press the power button on the control panel or remote control to turn the unit on or off.
- Adjust Humidity Level: Use the humidity adjustment buttons on the control panel or remote to set your desired humidity level between 35% and 95% in 5% increments. The humidifier will automatically maintain this level.
- Set Mist Volume: Select from 1 to 4 fog volume levels to control the mist output intensity.
- Timer Function: Activate the timer function to set the humidifier to run for a specific duration, up to 12 hours.
- Remote Control: Use the provided remote control to conveniently adjust settings from a distance.
- Light-Free Operation: The screen light can be turned off during operation to provide a dark environment, which is beneficial for plant growth cycles.
- Auto Shut-off: The humidifier will automatically shut off when the water tank is empty, preventing damage and ensuring safety.
6. Maintenance
Regular maintenance ensures optimal performance and longevity of your humidifier:
- Cleaning: Periodically clean the water tank and base to prevent mineral buildup and bacterial growth. Use the provided cleaning kit for best results. Always unplug the unit before cleaning.
- Water Quality: Use clean, cool water. Distilled or demineralized water is recommended to minimize mineral buildup and extend the life of the ultrasonic atomizer.
- Storage: If storing the humidifier for an extended period, ensure it is thoroughly cleaned and dried before packing.
7. Troubleshooting
- No Mist Output: Check if the water tank is empty. The unit will automatically shut off when water is low. Refill the tank. Ensure hoses are not kinked or blocked by condensation.
- Inaccurate Humidity Reading: Ensure the sensor probe is placed correctly and not directly in the mist path. Allow some time for the sensor to stabilize.
- Unit Not Turning On: Check if the power cord is securely plugged into both the humidifier and the electrical outlet.
- Unusual Noise: Ensure the unit is on a stable, flat surface. Check for any foreign objects in the water tank or mist outlet.
8. Specifications

Image: A graphic displaying the detailed technical specifications of the MARS HYDRO 15L Humidifier.
| Feature | Specification |
|---|---|
| Capacity | 15 Liters |
| Voltage | AC100-240V |
| Power | 100 watts |
| Noise Level | <40dB(A) |
| Frequency | 50Hz/60Hz |
| Max Timer Setting | 12 Hours |
| Max Humidity Output | 1600ml/h |
| Humidity Range | 35%-95% |
| Product Dimensions | 11.81"D x 9.05"W x 22.95"H |
| Item Weight | 11.24 Pounds |
9. Warranty and Support
This product is eligible for a 30-day refund/replacement return policy. Additionally, protection plans are available for purchase:
- 3-Year Protection Plan
- 4-Year Protection Plan
- Complete Protect (monthly billing)
For specific warranty claims or technical support, please refer to the contact information provided with your purchase documentation or visit the official MARS HYDRO website.





