I am in my 12th day of my bubble algae eradication routine and most of the bubble algae is either gone or transparent and soon to be gone. During this process I was expecting both my NO3 and PO4 to increase due to dying bubble algae but that has not been the case. Prior to the eradication process my nutrients were fairly stable with NO3 between 7-10ppm and PO4 between 0.07-0.1ppm. After day 5 my NO3 increased to 13.6ppm with no difference in PO4. Today is day 12 and my NO3 increased to 18.6ppm with no change in PO4. Why would I see the expected increase in NO3 but no change in PO4? I was expecting both to increase but that has not been the case. I have a DND and for the past 4-6 months it has been on NO3 stability mode but today I put it back into NO3 reducing mode.