Sea Water Parameters Posted on August 29, 2016April 30, 2017 by admin Reef Tank parameter guidance Mag should be at 1350+ppm Calcium to Alklinity(DKH) 370 ppm to 1.4 dKH 380 ppm to 2.8 dKH 390 ppm to 4.2 dKH 400 ppm to 5.6 dKH 410 ppm to 7 dKH (natural seawater) 420 ppm... Read More