Had a fungal infection, I believe the rockwool was saturated for a lot of the time and this is what caused the fungus,View attachment 3429131View attachment 3429132 onslaught of strange growth and ultimately death.
not without cutting the diaphragm / downpipe down. I could just add more medium to raise the bed. Any body have any experience with the waterfarm? Ie how often to feed? A mix of errors caused this, over watering was definitely one of them