FWIW, I sent in an aquabiomics sample a couple if weeks ago. Ended up swabbing the bubbles on this acro.
Should have results here soon.
I did have several losses, but I think I found the cause... my phosphate reagents that I used occasionally were expired. Kept getting readings around .4, which is normal for this tank.
However, with new reagents, it came back at the Hannah ULR max .9. After a dose of 7ml Lanthanum Chloride over the course of a day, (should have reduced Po4 by approximately .3-.4 according to bottle)
Readings came back at .83.
Brought back down to the .3-.4 range since via Lanthanum Chloride. PE has definitely improved.