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KAI Freshwater Kit

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Elevate your aquascape.

KAI is your gateway to create a thriving ecosystem for your beloved fish and plants! Whether you're a seasoned aquarist or a first-time attempter, the KAI Freshwater Kit is the ideal solution for fostering a flourishing environment that mirrors a natural freshwater biome.

Freshwater Kit

This Kit Measures

This freshwater aquarium-focused KAI kit comes equipped with KAI—the Felix Smart controller—and a suite of probes that measure:


Acidity (pH)


Total Dissolved Solids (TDS)


Electrical Conductivity (EC)


Salinity (SG)

Water temperature

Water Temperature


H2O presence

PAR (App feature)

PAR (In-app)

Light intensity (App feature)

Lumens (In-app)

What's In The Box?

Controller & Power Cable

Temperature, Conductivity & pH Probes

Felix 1080 Camera

Probe Holder

4-Slot USB Hub Holder

Ethernet Dongle

KAI Has Automation Styles For Every Desire

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Stay Connected To What Matters Most

The included Felix Cam offers an even closer look at your tank, letting you keep an eye on your aquatic life from anywhere, at any time.

The Felix Smart 1080p HD Camera is shown and a livestream of freshwater aquarium through the Felix Smart application is visible next to it. Text on screen says "Check-in from ANYWHERE"

Create Stunning Timelapses With Ease

Words From Our Users

"Overall, I highly recommend the Felix Smart Aquarium controller to anyone who's serious about their aquarium hobby. It's an excellent investment that has truly taken my planted tank setup to the next level. Additionally, the customer service and support team is fantastic ... It's hands down the best purchase I've made for my aquarium setup."

Fantastic company on the forefront of innovation. Customer service is exceptional. Communicate with them and they will communicate with you to improve the development of these emerging, life and time saving products.

Felix Smart rocks! I love the idea of being able to see my tank while away. I'm nuts on this product!

Detailed Specifications

Material ABS Flame Retardant
A/C Plug Input
100-240V~, max 10A 
A/C Plug Output
100-240V~, total 9A
USB Output
5V, 2.0A
Total Max Watts:
North America: 1100W
Grounded Sockets 8
Size (L x W x H) 28.5cm x 16.8cm x 13.7cm
(11.2" x 5.4" x 6.6")
Available USB Ports
6 - Expandable up to 30 using powered USB hubs
Certifications CE, FCC, ROHS
Intended Use For indoor use only
Waterproof Not Waterproof
Resolution Full HD 1080P - 1920 x 1080P @ 30fps
Compression H.264, MJPEG
Microphone Disabled
Temperature Range 0ºC - 70ºC (32ºF to 158ºF)
Water Use Not Waterproof
Intended Use Indoors, outside of high humidity spaces.
Connector USB
Cable length 1.2 meters (4.5 ft) Extendable to 25 ft with a USB Extension.
Mounts 1/4in – 20 UNC, Adjustable swivel and Velcro.
Certifications FCC, CE, ROHS
Reads EC, TDS, SG
Range 5 - 200,000 μS/cm
Accuracy +/ – 2%
Response Time 90% in 1s
Temperature Range  1°C to 110°C (33.8°F to 230°F)
Max Pressure 3,447 kPa (500PSI)
Max Depth 352m (1,157 ft)
Connector Felix Smart USB
Cable Length 1 meter (~39″)
Internal Temperature Sensor No
Time Before Recalibration ~10 years
Life Expectancy ~10 years
Material Double Junction Silver / Silver Chloride
Reads pH
Range 2 - 13
Resolution +/- 0.1
Accuracy +/- 0.1
Response Time 95% in 4s
Temperature Range  1°C to 60°C (33.8°F to 140°F)
Max Pressure 345 kPa (50 psi)
Max Depth 35m (114 ft)
Connector Felix Smart USB
Cable Length 1 meter (~39")
Internal Temperature Sensor No
Time Before Recalibration ~1 Year
Life Expectancy ~2 Years
Material Stainless Steel, ABS
Reads EC, TDS, Ground Moisture, Temperature, Water Presence
Temperature Range -20ºC to 70ºC (-4ºF to 158ºF)
Electrical Conductivity (mS/m) 0 - 300 mS/m
Degree of Water Saturation in Soil 0 - 100% 
Volumetric Water Content from Dielectric Permittivity:
ε.VWC = 0.002974 * pow(ε,2) + 0.07424 * ε -1.295 : 0 - 100% /8%
Dielectric Permittivity (ε) (Temperature corrected) 1 (Air) : 80 (Water) / 5%
Total Dissolved Solids (ppm) 0 - 2000 ppm
Max Pressure 689 kPa (100 PSI)
Max Depth 70m (230 ft)
Connector Felix Smart USB
Cable Length 2.7m (9 ft)
Time Before Recalibration ~ 2 Years
Water Use Waterproof  

Frequently Asked Questions

What happens if my Wi-Fi goes out?

KAI is Wi-Fi compatible, not Wi-Fi dependent. KAI remembers your settings and will continue to utilize your probe/sensor values to automate your environment, even without Wi-Fi connection.

How many devices can be used with KAI?

Customer Reviews

Based on 21 reviews

I love my Felix, I had a tank crash in the middle of the night. my Felix alerted me and I was able to save 60% of my livestock thanks to those alerts!

Thank you for taking the time to write this review, despite your circumstances. All of us here at the office are wishing you well during this time. Please don't hesitate to reach out if there's anything else we can do for you, Jason.

Nick Pacheco

Absolutely amazing Tom the founder of the company is the most caring and helpful person to get you all up and running and enjoying your Felix! I’ve never been treated better by customer service before I’m definitely going to be a repeat customer for sure!!! I can’t wait to see what new products they come up with next! Thanks again Tom for all your help and support!

Your support means the world to us, Nick!

Randall Allen

I'm from south carolina and i Love the Felix, anytime I have a issue they make sure it's fix right away. They have THE best customer service. They are able to walk you through step by step with any issues you have. The respond time of getting you going is almost asap. I never waited more that 15 minute to have my issue Resolved. If you are thinking should I buy a Neptune or a Felix try not to think to hard, Felix is the way to go!!! you won't regret the Felix!!! BTW Tom Thank you for everything you've done!! Can't wait to see what Felix will do next!!!

Thank you Randall!

Fabrice Bernard

Quick review on the Felix Smart Aquarium controller for my planted tank setup that I purchased, and I am absolutely thrilled with it! The setup process was a breeze, and I was able to start controlling all my equipment, setting timers, based on events and scenarios for connected devices right away i.e canister filter, heater, UVL, CO2, mister, and dosing pump. What I love most about the Felix Smart Aquarium controller is how easy it is to use. The app is intuitive and user-friendly, for example to customise my lighting and temperature settings by creating dependent rules based on the IFTTT system with just a few taps. The real-time monitoring and alerts are also incredibly helpful. I can keep an eye (literally- Webcam feature) on my aquarium from anywhere, and I'm always alerted if something isn't quite right. Another great feature of the Felix Smart Aquarium controller is its compatibility with other smart home devices. I was able to integrate it with Apple HomeKit, which gives the ability to control my aquarium with voice commands. It's also compatible with Google Assistant and Alexa, making it easy to incorporate into my smart home ecosystem. Overall, I highly recommend the Felix Smart Aquarium controller to anyone who's serious about their aquarium hobby. It's an excellent investment that has truly taken my planted tank setup to the next level. Additionally, the customer service and support team is fantastic - despite the time difference, me being based in Australia and them in Canada - they are always prompt to reply and always eager to help. It's hands down the best purchase I've made for my aquarium setup.

Thank you Fabrice! It's always a pleasure communicating with you.

Stefani Early

Hubby purchased system and upon installation we struggled with the Wi-Fi set up. Felix works only on 2.4, highly suggest separating your dual band internet naming them different from each other. We worked with their IT depart (Tom and Lucas) and these guys are the best!! They were available to chat with me until we got the unit up and working properly. This system is so much more affordable than the Neptune/apex system and I HIGHLY RECOMMEND!!

Thanks so much for the kind words Stefani! We are so happy that we were able to help. Contact us anytime with any questions or feedback!

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