I am working on planning out a 75 gallon tank, and I have gone through several stocking plans. It is almost time to get fish (Yay!), so at this point I am going to have to figure out what I want to do. Here is roughly what I am thinking about: I am mostly happy with this plan, but I have few questions. First, is it possible that the tetra fish can coexist with my larger fish, or will they get eaten? Second, is the tank overstocked? I wanted my stocking to be closer to 80 percent, because I don't want to have to be on top of my water parameters all of the time, but it just doesn't seem to be working out that way. Will a stock of almost 90% (on AqAdvisor) be hard to manage? Lastly, I want a relatively small fish (like cardinal tetras) that is very colorful, and that I can have a huge school in. I like cardinal tetras, but I was wondering what my other options might be. Can anyone think of a small (2-3 inch), very colorful schooling fish that I could add a huge school of into my tank? Any other suggestions or criticisms would also be appreciated. I want to make sure that I end up with a beautiful, healthy aquarium.