JBL ProAquatest LAB Test case with 13 water tests for the analysis of tap water and freshwater aquariums Healthy aquariums with conditions close to natureThe right water values are dependent on the fish stock and the plants in the aquarium. Even if the water looks clear it can be contaminated. Bad values can cause diseases or algae in the aquarium. To maintain a healthy aquarium with conditions close to nature it is important to check and adapt the water values regularly. With JBL water tests you can determine all relevant water values quickly, easily and very precisely. Monitors water values in aquariums simply and reliably. Determines pH (3 ranges), carbonate hardness, general hardness, ammonium/ammonia, nitrite, nitrate, phosphate, iron, copper, silicate, oxygen, and, with the help of a table, the CO2 calculation. Add the reagents to the water samples, compare on the colour chart, read off the values and check the analysis sheet to see which actions are recommended, if any Comparator system takes the inherent water colouring into account. CO2-content is determined by pH value and KH value using the table. Contains a childproof reagent bottle in a waterproof plastic case. Refill reagents are separately available Package contents: 1 test case, incl. 13 tests, 12 glass vials, 2 syringes, 3 measuring spoons, thermometer, comparator block, 2 plastic cuvettes, colour charts, CO2 table, pen, report sheets, operating instructions The following tests are included in the test case:pH test: water acidity from 3.0 to 10pH test: water acidity from 6.0 to 7.6pH test: water acidity from 7.4 to 9.0O2 test: determination of the oxygen contentGH test: determination of the general hardnessKH test: pH stability of the water (carbonate hardness)PO4 test: determination of the phosphate content (reason for algae growth and plant nutrient)Test NH4 / NH3: identifies non-toxic ammonium, uses table to determine any toxic ammoniaNO2 test: determination of nitrogen compound nitrite, which is toxic for the fishNO3 test: determination of the nitrate content (reason for algae growth and plant nutrient)Fe test: determination of the iron content to monitor fertilisationCu test: determination of heavy metal deadly for invertebrates. Also important for adjusting the dose of therapeutic medicationsSiO2 test: determination of the silicates (silicic acid), which cause diatomsTo determine the CO2 content, you just need to measure the pH and KH values. These two values will give you the CO2 content in the water, which then can be referenced from the enclosed table.