Monitors the water values in aquariums simply and reliably. Determines: pH value, carbonate hardness, iron, nitrite, nitrate, CO2 (calculation via table) Easy to use: add aquarium water to cuvette with syringe, add indicator and compare colour on colour scale, or count drops until colour changes in KH test Comparator system takes the inherent water colouring into account. CO2-content is determined by pH value and KH value using the table Childproof reagent bottles, waterproof plastic case, refill reagents separately available Package contents: 1 test case for aquariums. 7 reagents, 3 glass vials, syringe, measuring spoon, comparator block, plastic cuvette, colour charts, report sheets, operating instructions