If you look above and left there is a cave opening, that is the door under the arch that leads to the swim through hole.
I have a RW 4 behind there that needs a clean, it is set on else mode and pumps great flow through the door, bounced off the weir box.
It sucks down a vortex from the surface, great random flow there as 3 different flow sources collide.
I have a RW 4 behind there that needs a clean, it is set on else mode and pumps great flow through the door, bounced off the weir box.
It sucks down a vortex from the surface, great random flow there as 3 different flow sources collide.