dkh 5.1

Hi I'm having difficulty rising my Cal/Alk levels i have increased dosing from 55ml to 200ml 116 gallon tank. Previously 55ml to maintain DKH 8.0 and PH 7.7-7.9 up until 10.02.2020 when i noticed C Balance Part B was not being added by Apex dosing pump as tube was not fully submerged in bottle...