Ok so according to J&L the powdered magnesium chloride and the flaked magnesium chloride are the same thing. Bought the flaked stuff and it dissolves fine and what not but was a pain in the butt to get flakes small enough to fit into the jugs small opening.

Ok still need a little help. My calcium is at 450 my alk is at 8 and magnesium is at 1350.

After checking my alk every day it turns out I am using .3 dkh every day. So according to the 2 part calculator I need to add 12ml a day of alk solution.

My only question is about water changes. I have about 55g of water in my system and do 5g water changes once a week. My salt usually mixes up around 10dkh. So what is the best way to keep alk at 8?

Should I dose a little less then needed so when I do my water changes it brings it back to 8?

You can dose less on waterchange day , a small water change even in higher alk isn't going to effect it to much and you can always control the amount of alk that's added be it what you daily dose or the salt mix it's self can be manipulated for more or less.