I have been reading 4.9 alk with my Hanna tester. According to the BRS calculator I needed 725ml of alk to raise my system up to 8.5. I have been dosing about 100ml per day for the past 3 day and testing daily. After 300ml I am only at 5.9 and just wondering if this is a normal for the alk to raise this slow. I only have a few small frags and a large 200+ head duncan in a 250 gallon system so nothing really sucking up the alk. Should I just keep adding the 100ml/day??