am i reading that right on your first couple of pictures? Alkalinity-144?
def should throw the api out now that your done cycling, and since im guessing the corals didnt make it, go out and get some good test kits for your main three parameters, alk, ca, mg....practice on keeping your parameters stable for a couple months, keep a log book or download an app that will keep up with your entries when you test and it will graph it for you so when the two months is over, you can look back and see how stable youve kept it. and as far as ph, def do not try and chase a perfect ph man......youll drive yourself crazy.....im hoping that hanna checker for alk wasnt right at 144, bc i sure didnt see any dots like 14.4 lol....if thats the case thats what melted away your corals.....but stability is the key...id say practice that first than add corals slowly, like one at a time man not 15....slowly and surely wins the race in this hobby every single time brother! sorry for your loss though man, i couldnt imagine spending that kind of money and losing it all, im so sorry