I don't easily give up.. so I set myself with a new challenge.
From my previous post all know that my growbed is comparatively low to highest water level in my tank to the point its almost give no aeration to the tank as photo below.
So above condition as baseline, I need to make the most of this condition to aerate the tank.
This is the highest water level in my fish tank and that's the shortest initial down vertical for the siphon outlet I can afford without readjusting water in flow.
The goal will be to achieve better aeration without compromising siphon operation. If this fail the the growbed have no other choice but to go on bricks
I am open to any suggestion.