Hello,have a question to ask. Did water test and my cal. is at 380 and my dkh is at12.Dosed one time with reef fusion 1&2. after i dosed.i was wondering if i could dose just part 1 and back off part 2 till my cal. comes up.I have fish and corals,And what is a good number for dkh.Read alot, different people say different things.Some say 6 to 9 others say 8 to 12. what is to high. Thanks,