Anyone know a reef calculator where you set your goal parameters, then enter your current parameter then it will tell you what you need to adjust. I have a dilemma where my Alk is 12kdh, cal is 480 and Mag is 1500. I am using calcium reactor with ARM media. I stop the reactor for one day to reduce my ALK level 9.8 but CAL go to 500 and mag still high. I though if I stop using all the number will go down. Is it because my MAG is out of range that cause other number is out of balance?