I saw a video on YouTube and thought it'd be a fun project for my son and I. We have a beta fish in a small container with and avocado seed. I know at some point in the near future the water and little fish will not sustain the avocado. So my question is, what then? Will my fox farms nutes kill the Beta? Is there a different type of nutes, or fish for that matter, that I should use when the time comes? Is this even possible to keep both healthy and happy in the same compntainer throughout their life span?