Since I can't really see very far into the tank, I decided to try taking a video of the fish. I don't have an underwater camera, so I took an old video camera that has a "night vision" setting, sealed it in a Ziplock bag (the kind with a double seal), and sealed the top of the bag with duct tape (good old duct tape). I tried to hold the camera in the water near the light so the camera could "see" better.
As you can see in this video, I didn't get a great picture, but considering my resources, it's not too bad. You can see a couple of fish swim by a few times in this video. Sorry for the camera movement, but I was doing this blind, with both arms submerged past my elbows in 56 degree water.
Maybe with a little practice, patience and a brigher light or two, I'll get better at this, but for now, here's Fishcam1.
I've seen a picture of someone else's tank with a section of the tank cut out and a piece of plexiglass somehow secured over it. I don't really want to introduce more possible leak sites, but if I can find out how to seal it well, I might do that next year between sets of fish.
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