There are many meters and testers available to help you in your hydroponic growing stint from measuring tools, timers to controllers. There is a huge range of small products that make a big difference to how easy your garden is to manage. A walk through this product category should find a few tools that you can use for better control and results in your garden.
The Growth Technology pH Liquid Test Kit comes with a test vial, test liquid and colour chart so growers can easily check, and adjust the pH levels of their nutrient solution. Just add some drops of test liquid to a sample of the nutrient solution, shake and compare the colour to the chart. Supplied in 20ml bottles that will last...