Most were with the rain gutter. The last set was with an ac-strobe in the canopy activated by a bounced flash over the tank.
I took a piece of the left over gutter 11" long and stuck it in the oven on a cookie sheet till it flattened out and molded a big bounce card out of it that attaches to my flash. Works great for kid shots and bugs too!
I haven't had much luck with fill flash from the front of the tank, never could get the angle right to stop reflections off the glass so I gave up. Tried it from the side of the tank a few times with an old flash but couldn't get it balanced right. Might try it again since I can adjust the power on my new flash, had it for 10 months now, just haven't tried using it for fill yet.