If you alk is spiking like that when you dose, cut the dosing amount....you really want to pick a number like 9dkh or the meg/L equivalent in the middle of the "acceptable range" to give you wiggle room for just this situation or if you miss a day it doesn't tank, and only add enough B-ionic daily to offset the alkalinity that has been used up daily.
Either do a water change or let it drop on its own, the Ca needs to come down also.
As with the salt I pick a range in the middle and try not to push either edge of the acceptable range.......most set there SG at 1.025, but with a refractometer....if you use a swing arm....it could be off and higher than you really think......in addition, if you topoff by hand and have a smaller tank.....your SG could be raising to 1.027 for instance which could be getting into the "danger" zone.......I say pick a nice "safe" moderate number until you can control it without any problems I would say 1.023...used it for quite a while and don't see any ill effects....that way you have a little wiggle room for error.......which you are still working out.
