Darrell, happy to help. You can do quite a few things in your pond - and you're starting the right way with good water and aeration. Before anyone recommends anything, first question will be "what are your goals?" What do you want for the pond? How will you use it? Do you want to feed? What types of fish do you like to catch? Etc. Is the pond free of all fish now?? What is the history of it over 15 years? Nobody here will push a perfect strategy on you, it all depends on what you want to accomplish.