I have decided to give up my goldfish and plecos and replace with something different. The tank is a 72 gallon. I do have a baby turtle (4 inch red eared slider) in there. He (or she- we dont really know) has been very easy going with everybody whos in there now. I realize he will get big and possibly start to take an interest in eating his tank mates- we'll cross that bridge if it comes. Anyways- I want to get a school of tetras. I really would like to put another type of fish in there- maybe just 1 to 3 of something. What can live peacefully with tetras? I really like discus or angel- is that a possibility? Also, what is a good number of tetras to get?