It began after a 3 1/2 day blackout and 80% water change on account of GSA. Fortunately the GSA is gone, but the water has a definite milky haze to it. After 5 days and another 80% water change, it is back again, although not quite as much as before. Is this a bacterial bloom, and do I simply wait it out?
Incidentally, my Parrot's Feather, Rotolo Macranda, and Wisteria all grew quite well during the blackout. When I uncovered the tank, they were all tall and folded up, looking much like they do near the end of their normal photoperiod.