Reef Factory

KH keeper Plus

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The Smallest Device in the KH keeper Family

  • Full Automation of Alkalinity Testing
  • ± 0.01 dKH Accuracy
  • Daily Readings Every 1-12 hours
  • Track Historical Alkalinity Measurements


The KH keeper is a smart automated alkalinity testing device that is able to not only test the alkalinity level in your aquarium, but can also notify you of issues. The use of the KH keeper means less manual testing, catching potential problems faster, and greater water chemistry stability for your aquarium inhabitants.


Smart Notifications of Alkalinity Issues

In addition to viewing your alkalinity test results remotely in the app, the KH keeper will also notify you when your alkalinity is outside of your set safe range. If the level drops too low or goes too high between measurements, the KH keeper will retest. If the results are confirmed to be outside of your safe range, you'll receive an instant notification. There are also built-in LEDs, which can help you determine if the results are in the safe range, just by looking at the device (Green = Normal, Red = Outside of Safe Range, Blue = Currently Testing).


Download the Reef Factory Smart Reef App

   Google Play - Reef Factory Smart Reef AppiOS App Store - Reef Factory Smart Reef App


Concentrated Reagents

1 Liter of concentrated reagent is enough for about 1,429 tests, on average, making the cost of operating a KH keeper very affordable. The app will also notify the user when the reagent is low and needs to be refilled.

Reagent Mix Ratio: 1L of Reagent / 9 L of RO Water


Use Alongside Reef Factory Dosing Pumps

If your system also has a Reef Factory dosing pump, you can have the KH keeper and dosing pump work together to automatically adjust alkalinity levels in your aquarium for you. Alternatively, you can have the Reef Factory app turn off your dosing pump if your KH level is too high or low, allowing you time to investigate the problem yourself.




Dimensions: 3.54" L x 4.17" W x 8.27" H

Supply Voltage: 100-240 V AC 50/60 Hz

Power Consumption: 5W / 24W max


What’s Included?

KH keeper

10ml Graduated Cylinder

100ml Graduated Cylinder

Silicone Tubing

Power Supply

Resetting Magnet

pH 4 & 7 Calibration Packets

More Information
UPC 5903814433222
Manuals KH keeper Manual
Control Type WiFi / App (Included)
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