The idea came from a friend of mine who worked in a pet shop. We were both managers of a fish department so we were trying to figure out ways to improve the fishs' health. Mind you this was about 11 yrs ago, and there are way more products out now than before. The concept was to clip a thin slice of orange to a lettuce clip. I did it last night, and the shrimps kept the fish away from eating it. I was recording it on my digicam, but only got footage of the shrimps eating it so I figure I'll try again later. You don't want to put too much because it'll release some sugar (organics) into your system. It's just a natural way of delivering Vitamin C to your fish, which is beneficial since there are vitamin C products on the market.