JBL ProAquaTest PO4 - Refill

Determining the phosphate level for optimal plant growth or to find the source of algae in seawater, freshwater, and ponds. Comparative laboratory system to offset the water's own coloration: fill the test tubes with the water to be tested, add the reagents to one test tube, place the test tubes in the support block, and read the values on the colour chart. Usage: new freshwater/seawater tank: once a week. And in case of green algae or tap water testing. Included in the: 1 Test kit for about 50 measurements, 3 reagents (2 x reagent 2), 2 glass test tubes with screw caps, syringe, measuring scoop, comparator, and colour chart. Refill reagents available separately.