i was relying on falling solution to churn as it entered the plant section. but know i have put a hole in the deivery tube so some of the solution falls back into the tank getting aerated then being pumped into plant section. i will also put a spare pump i have in just to aerate the water near main pump. as for pics i only have the phone cam, and only 2 plants in the system which have just rooted to the spreader mat, so i don't really want to disturb them as the roots seem to look ok at the moment. i'l see what happens over the weekend and let you know on monday.