I think I'm going to stick with two-part dosing. Or I may just get a new Kalk reactor. The PH dropped like a rock last night. It's amazing how much of a difference the Kalk makes.I'd do the dry version of Tm all for reef, if you work out dosing the levels you need are affordable. (No effect on pH or salinity/micro elements)
If it is over budget for the dry powder version of all for reef, go to two part and use that til your reef is more mature, then go calcium reactor.
If you go to calcium reactor now, you will only make your existing pH problem worse.
Of course we also had a dinner party at the house last night, I'm sure that didn't help either.