Therion, I went back and looked at your journal, and it appears to me that you are not REALLY using the SH Bubbleponics system. I might be way wrong, but it looks like you your tank is very shallow, or not 18 inches deep.
AND, do you have the submersive water pump, in the water, pumping nutrients to the cups through the feeder tubes? And I also see you got 20-20-20 regular fertilizer for nutrients, is that correct?
I and everyone else here would love to help you, if you can give some more details on your system.