Hydroponic farming gives farmers full control of their crops. One can maximize the growth and yield of their crops and it reduces the risk of losses due to external factors--like weather and other elemental setbacks. In hydroponics, your plants' growth rely on these two additional factors: the presence of total dissolved solids in the water and the pH level. Controlling the total dissolved solids and pH level enables you to monitor the amount of nutrients your plants are getting from your water. Combination meters should be helpful in assessing the TDS and pH level in your garden.