JBL ProScape Test LabThe ProAquaTest Lab from JBL ProScape is the ideal professional test set designed specifically with aquascapers in mind, allowing accurate ability to detect the levels of nutrients dissolved in the water to prevent deficiencies which commonly causes most issues faced by planted aquarium owners. Monitors the water values in aquariums simply and reliably. Determines: pH value, carbonate hardness, CO2 direct, iron, magnesium freshwater, potassium,