You've been down the SLAM road so much you have this down to a science. If you wanted before closing, you could go back to SLAM level, pass the 3 criteria, then simply increase to MA level for 24 hours. That :should: take care of it should it be MA.
I’m not too worried about it. Given the crack in the fiberglass, I’ll have to drain the water before too long. I’ll just keep it under control until then and then go over everything with a fine tune comb while the pool is empty. I’m thinking about something like spraying down the entire shell with a chlorine/water mixture before filling it back up. Will think more about that when the time comes.