Dont worry james everyone goes through it. From the beginner to the experts. Sanjay just lost most his acros due to stn/rtn. I lost many 4 months ago. As for your montis they are very sensitive to jumps in alk. If you can keep your alk stable they are pretty easy to keep
I'm not worried at all about it. It seems to be the nature of the beast.
I figure we might as well laugh a little about it.
Alk and all params stable. Nitrate a little high. That prolly did if. But again, who know. Maybe it just committed suicide ;/