Interesting idea on placement Aquariart - the vertical set-up. Would help prevent dead spots in the tank I suppose, depending on how other filter outlets are set up.
I use mine to ripple the surface - horizontal at back, facing 'out', just below surface, holes angled so they creat ripples without ripply noise.
I use mine to ripple the surface - horizontal at back, facing 'out', just below surface, holes angled so they creat ripples without ripply noise.