Raise my PH

[Long Island Reefer]

My ph was around 7.7-78, added an airline from outside which increased my ph to about 7.8-7.9. Started dosing Kalk 1 TBSP per 1 gallon of RODI at 1.5 ml every 30 min(72 ml) and my ph is consistently 8.1-8.3. slowly increasing my kalk to match my daily consumption of alk.