Water quality is one of the most important factors when growing plants hydroponically. This is because nutrients in solution can become unavailable due to interactions with salt. Water can also contain high levels of sodium and chloride that are toxic to plants. Botanicare recommends using reverse osmosis (R.O.) water when mixing nutrients, and for hydrating growing media like Botanicare’s Cocogro and Readygro. When you want to grow the best hydroponic crops you have to start with the best water. For more information on how you can get the best water for your plants, please visit our partner, Hydrologic.