here are a few pictures to give you an idea of the flow in there.
Since the tank is not totally full the CL pulls air every so often, as it does so the air is shredded to microbubbles by the pump and then shot out of the penductors.
While I wouldnt want that when the tank is full, right now it is good as I can see how the penductors are working and how they are angled.
This is a semi full tank shot as the air is fist blown out of the penductors:
---notice the chromis...looks kind of lost in there.
here is a closer view of the middle penductors, shutter speed was 1/60th second...so you can tell there is some velocity in the system.
Looking at the flow i may need to adjust the lower PD to give a smoother flow across the tank bottom.
As it is there are small vortexes of sand that crop up every so often and move around the bottom.
---apologies for not cleaning the tank front....im in and out constantly and leaving drips everywhere.
P.