I was\am fighting briopsys, trying to get my mag up to 1600, in addition my alk was around 6dkh, with the dosing my briopsys is going away and my alk has come up with dosing 25-30ml of Alk via dosing pump its right around 9 and holding now. I do a %10 water change every week. I didnt start out with that much mag, just kept increasing it slowly until my Mag started to increase slowly.