General Hydroponics® Hardwater FloraMicro® 5-0-1
If your tap water is over 200 ppm or contains calcium above 70 ppm, use FloraMicro® Hardwater. If your water contains 30 to 50 ppm calcium, you can mix our original FloraMicro® with FloraMicro® Hardwater to create a perfect Micro blend for your plants.