You need to test your alk daily, make adjustments per the calculator, and adjust your timer accordingly. I would add alk over a couple of days till you get to a reading of 8-9.
I would also adjust your timer up. the key is to test daily, use a API test kit very quick. Once you get it dialed in you can almost forget it,,,but you should still check every 2-3 weeks.
It is difficult to give you specific advise since we do not know how big your tank is, or how long you are dosing now, using recipe 1 0r 2 etc. a lot of important items missing. the BRS dosers put out 1.1ml/minute and you are at 6dkh that's all we know.