Their size and potential for aggression (though I never experianced it in my lightly stocked 10gal, not cramped with only five fish) was the reason they were being moved to my larger aquarium. The water is fine, I checked, and they have never jumped before. But now that I know they do jump then I will take proper precautions the next time.
I am not about to argue that they will eat waste but that is what I was told by the people I bought them from and have been unable to find anything that has said otherwise so I am only going on the knowledge that I used for the year and a half that I had these two little guys. (they did start out very small and were about 2.5 and 3 inches when they jumped) I was told by my brother's friend and a employee at the store where I bought them that they were good fish for starting a tank, that they would stay near the bottom and that they were scavengers, as in they would eat the food that the other fish wouldn't. Now I don't feel very good that this information was not complete but that is the best I had at the time and what I went on. That and the fact that they never fought among themselves and that they seemed to always want to be close to each other. My tank, and my feeding of the fish did not kill them and neither did my water. (I checked) They were very healthy, powerful fish, they just decided to bale and I am very upset about that.
And through this thread I have realized that I have been calling them redtail sharks when they are rainbow sharks. I called them redtails because we don't get redtails where I live and therefore redtails and rainbows are referred to as the same thing. That was my mistake.
Thank you for your inpute and corrections and can someone please direct me to a proper sight about these sharks as I cannot find them. I am very willing to look into these things and I'd still like to have this kind of fish in my tanks considering that they were such sweeties for me.