by Jorge Cervantes
Bad Water
If the raw irrigation water has a reading of more than 300 ppm, or the sodium level is above 50 ppm, or the calcium / magnesium levels make water “hard”, you should use a reverse osmosis device to filter the mineral salts and make “pure” water.
Reverse osmosis (RO) filters are the easiest and most efficient means to clean excess minerals (dissolved solids) from raw water. To use an RO filter, you need a water tap, drain, and reservoir for the “clean” water. About 65-70 percent of the water processed is waste, and 30-35 percent is clean with an EC near 0.