Hi
the close dosing would not effect the chemical imbalance, the GHL is used by well over 1,000 users now in North America.
I would suggest two things
Use manual mode as per the instruction manual I sent then you have full control over when it doses, if you want help setting this up just call me.
But you have hit the nail on the head really, bad chamicals "cheap chemicals" are cheap for a reason. I do not know what you are using but we have seen some bad stuff out there of late, more so in the "DIY" home brew catagory or stuff that is supplied from that process
calcium for salt clearance is NOT reef safe.
I will reply to your email also.