Know your water before you grow! HTG Supply’s selection of water quality testing and monitoring equipment is key to successful home cultivation. Not all water is created equal, and when growing indoors it is of the utmost importance to know the quality of the water you’re feeding …your plants. Testing and monitoring equipment can detect pH and total dissolved solids (TDS) issues before they happen, and the knowledgeable gardener can make quick decisions with that instant information. Shop now to find the right equipment for your water testing.