kH Keeper Q&A

The kH Keeper measures water from the aquarium. If kH drops too quickly between measurements the device will repeat the test and if the result is confirmed will send a notification to the user. An aquarist can set a value in the measurement difference. The tested water can be returned to the aquarium or go to the waste container, depending on user preferences. Everything is controlled by the Smart Reef application and can be connected with our other devices.

To run the device at your aquarium, you only need access to your home WiFi network, electricity, a mobile device (smartphone, tablet, computer or laptop) with the Smart Reef application installed and our reagent solution.

To prepare solution You will need RO water. For every 1 unit of reagent You will need 9 units of RO water. Remember to use precise amounts of each liquid for the mixture as it is very important for kH Keeper to function properly. Table below contains volumes of liquids used to prepare set amount of solution.

You can place the kH Keeper wherever you want, so that it has access by the hoses to the aquarium, water waste and reagent solution. The device is designed in such a way that you can place it in a visible place or hang it on the wall.

The magnet included in the kit is used to reset the device. If you want to restore the device to factory settings, apply the magnet to the area marked “RESET” above the hoses plugs and hold for 5 seconds. After this time, the device turns off and restarts. This means that the device has been reset.

The small pill inside the measuring cup is a magnetic stirrer which is mixing the reagent solution with water from the aquarium. Please pay attention and don't lose it.

Please see below our online tutorial on how to update your device to the latest software version. We have described there a few cases.

Please see below our video tutorial how to correct assembly and disassembly the glass beaker.

The amount of reagent solution that is used during the measurements is small and depends on the kH level in the tank (from 5 to 15 ml).

Yes. It is fully safe to have wasted water back in the aquarium after measuring.

kH Keeper can make corrections using the connected dosing pump. This function allows the precise control of the KH parameter to the level determined. It will soon work also with calcium reactors and 3rd party pumps via Power Switcher.

Yes. You can turn on or turn off the light indicator in the Smart Reef application by clicking the SETTINGS button.

Check that all connectors are connected together, then check that the hose is not damaged, e.g. frayed or broken. Check if the hose in the pump head is not chafed and if the tubes in the beaker are properly installed (inserted into the plastic connectors).

It is very important that the water filter must be completely submerged in the water, and its elements must not protrude above the water. After correctly placing the water filter inside the water, please click the “fill the circuit” button to pump out air bubbles and fill the full circuit with water.

It’s very important to keep close measure over the reagent doses and because we want to you to achive precise results when you are using your kH Keeper we’ve choose special motor for our reagent pump. It’s a step motor which is much more precise than a regular one. However they tend to make more noise than regular pumps.
It’s perfectly normal for them to work louder than other pumps. Pump should work more and more quietly as the time goes.