Blue UV dye added to the water.
A little closer to how it looks in real life.
I took the natural light shots so you can see the blue water. In reality, they look this blue in the dark under UV lights.
I held a light over the flying run so that tube lights up.
Added some lights at the bottom to light up the tubes to/from the pump, but they add so much glare the previous shot looks better.
Same thing but you can see the top here.
