Safe for everybody

From now on, you don't have to be a chemist to know the exact water values. No chemicals are needed.

Monitor progress

The digital test results can be saved using the Pond Test App. Clear graphics show the history of the water values.

App support

Download the FREE Pond Test App, enter the pond details and find out what the water values mean for your own pond. Velda helps you with a range of products to improve the water quality.

Stay in touch

It is easy to establish a Bluetooth connection between the AquaTesterPro and the Velda Pond Test App. The app is compatible with both Android and iOS.

For frequent use

Doubts about the accuracy of the test results make people skip regular inspection. Now you can be 100% sure about the results.

Faster water testing

Simply slide one indicator past the sensor to measure eight water values at the same time. It takes just a few seconds. The highly sensitive sensor also means the AquaTesterPro is more accurate than any of the standard test strips.

pH

The pH is the acidity of the water and it is an important value to know when you use products for water and algae control. The right pH ensures the proper disinfection of your pool. Excessive pH causes calcium deposits and slows down plant growth in ponds and aquariums.

KH (CH)

The KH is the carbonate hardness expressed in degrees DH. It represents the capacity of the water to function as a buffer. When the KH value is too low, acidification of the water may result, slowing down the growth of oxygen-producing plants.

GH

The GH is the general hardness expressed in degrees DH. It represents the calcium and magnesium ions in the water. Excess levels of these minerals cause deposits and turbid water. When the GH value is too low, plant growth in the pond will slow down and acidification may result, especially in winter.

NO2

The NO2 content is the nitrite level in the water. Nitrifying bacteria convert organic components into ammonium, and then nitrite and finally nitrate. Too much nitrite (NO2) in the water is harmful for fish. Replace the filter materials and refresh part of the water.

NO3

Nitrates (NO3) enter the water in organic dirt from plants, garden fertiliser, urine or fish excrement. Water plants absorb nitrate but NO3 levels may become excessive when the nitrification process is disturbed, causing algal growth and green water.

TA

The TA is the alkalinity of the water and it determines the stability of the pH level. When the TA value is right, the pH will be less sensitive to the impact of the weather and dissolved substances in the water. Remedies to improve water quality will also be more effective. Fish do not respond well to strong pH fluctuations due resulting from over-low levels of total alkalinity.

CL2

CL2 means the free chlorine in the water measured in mg/l. There should not be any CL2 in your pond/aquarium water because it destroys important bacteria.

CO2