I find this all very interesting, and after all, this is a forum also. Most of the fish in my tanks seem to be moving all the time, the exception would be the bettas. The otos are eating continuously. When I was a kid I had the opportunity to vacation on a lake with pristine water - in 12 feet or so of water, I could watch the fish when I was out in the boat. It was like one big aquarium and I was fascinated, but the fish were not moving around like the fish in my tanks. Until I left home I fished for one certain perch in the river by our pasture. I never caught him, but he was always in the same place in amongst the roots of a tree. I could see him but I couldn't lure him with my bait. I probably spent more than 5 summers trying. ( I lived in northern Wisconsin - the river froze solid, but he was always there in the spring) I read an article on "Aquabid" from several breeders that were feeding their fish live food free style successfully. I can't find the article now and at the time I read it, I really wasn't that interested in how they managed it. I do know if you want fish to grow, you have to feed them frequently, but then we also have to consider the size of our tanks.