WoW -- that's some collection - I am guessing all
ebb and flow.
Do you induce oxygen into the solution with H2O2 --?
How do the units drain completely?
How does one stop the rain from contaminating the solution?
If that's the weather where you are you are very fortunate - we have a foot of snow left on the ground from last weekends snow storm. We cant plant outside till the end of may. <-----<<<<< that sucks...
I am building some units for out side and will get some photos as soon it is in a reasonably advanced state.