spike

I have a mixed reef Waterbox 275 and just started using Moonshiner's dosing. After an ICP test I added correction trace elements including boron and my Trident reading for alkalinity jumped from 7.89 to 13.4. I though I would have a heart attack and tested with Sailifert and the alkalinity was...

I am not sure if this is a stupid question or not but ive have noticed my tank has crazy phosphate spikes after every change. maybe stirring the sand up too much or something? The new water always tests 0 phosphate (i am using hanna) but after the water change it can go up to 0.8-1 which...