Just curios as to what kind of ratios people are dosing of alk and calc? I've been averaging 8.6 dkh with kh and 420 ppm on the calcium side. At these levels in a sps dominate tank I've been dosing 70 ml of the alk part and 110 ml of the calcium part. My mag is at 1550 and I've been using all BRS additives to their mixing ratios. I use the recipe #1 that raises ph.