Thanks n8ly & Ryan. I guess to continue the question, it seems to me that there's a progression of management issues that ultimately leads to a serious amount of money investment to achieve certain goals. What I mean is; if you feed for growth(Couple of feeders$600.00 + feed), then there is this nutrient overload/too many pounds of fish for pond size. The solution then seems to be aeration($4000-5000) for sizable pond. Even with all this if one is pushing the red-line, then a DO crash is a real possibility( I get this from reading Pond Boss threads)..See, I don't really know any of this from experience because I am just now getting to the spot where real numbers of fish are going into my pond next spring. But I am trying to sort it out & make good decisions. I just want to be able to catch some 3-5 lb bass & some bream in a couple of years...du