Dennerle Test Strips
Dennerle WaterTest 6in1 Instant test for the 6 most important water values:
PH value, Carbonate hardness, Total hardness, Nitrite, Nitrate, Chlorine.
In just 60 seconds you know the water quality of your garden pond 50 test strips So you know whether all water values are as they should be for the well-being of plants and fish.
Recommendation: measure once or twice a week