6 in 1 Freshwater test strips.
Regualr testing of water quality is an essential part of good fish keeping. 6 in 1 test strips give you results for 5 parametres in less than 60 seconds.

The cour chart gives the levels for:
Acidity level pH
Carbonate hardness KH
Total hardness GH
Nitrite concentration NO2
nitrate concentration NO3
Chlorine TC