Guayni; SAHS wrote:

I disagree with those expressing preference to do it with the lights out.
Just imagine yourself thrown in a dark room full of enemies. Where are you
going to hide? can't see!

I once had a powder blue that was very territorial. I added a fish once with the
lights out, but you could see the tang chasing it all over the place. I think
they may be able to see a good deal better in limited light than we can. For
that matter, the chasee seemed to be able to see pretty well too!

Of course, that tang would chase a new addition with the lights on, so I think
it doesn't make any real difference.

George Patterson
Forgive your enemies. But always remember who they are.