I agree with all of Kona001's post, especially the "swimming off screen" part. I had all three fish swim off screen so that for what seemed like a LONG time I had a fish-free tank. It needs to allow five fish at least, just so there are at least one or two visible at all times.
I'm glad the number will be brought back up to five. As soon as that has been fixed and the lighting issues are fixed, I'll start using it again.
Since we are testing this Beta, perhaps some of these problems could have been avoided if a simple poll was taken beforehand, with questions like "How about only three fish in the tank?," and "What if the fish can swim completely off screen (and seemingly to some other fishy dimension) for extended periods of time?"