and less intense indirect

Another tank: Experiments with two back light tubes in different positions (first up, second down). Wall 10cm behind tank, no mate foil. I wrapped some parts of light tube directly with different colored bags.

Final photo:

blue bags on top and bottom back light tube. Bottom light is in the right corner to point out passages under roots.

etc, etc,....

With a little imagination and these “equipment” – the sky is a limit.

Nothing that I am using in my backlight experiments (even on tank with 120x50cm screen) cost me more than 15eur...

:yo: