The answer to questions 2,3, and 4 are yes. The first question is difficult. You need to know what's in the pond. If there are a lot of bass and you stock 3-5 catfish they will be eaten. Depending on how many bass you may not have even one catfish survive. You can have the pond shocked to see what is there. You can simply go fishing and find out what already exists in the pond. Tell the kids you are exploring and need their help.

You have come to the right place for help.

Good luck.