Alkalinity is super low after adding SPS

[b4tn]

Over the last month I have added two SPS colonies, a Hollywood stunner, a monti, several SPS frags, and a large Zoa colony. My levels have dropped from 7ish to 5ish for alk. Calcium is solid at 420 and magnesium has dropped from 1300 to 1200. I am using BRS two part for dosing and my alk bottle is going twice as fast as my calcium bottle. I just turned up my doser to 8ml 4 times a day. Calcium is still at 2ml 4 times a day. I thought the doses should be close to equal?

 

[Gator1970]

This what I thought based on past experience using b-ionic years ago, but based on testing I am now dosing approximately 2:1 alk to calc - I would have thought they should be equal dosings of each, but alk consumption is definitely higher in my case....