I have a low maintenance 1 acre pond built in 2003. It is stocked with RES, BG, and LMB. It has had 2 partial winter fish kills over the last 15 years due to prolonged snow on ice (never restocked). It is currently low maintenance because it has a natural edge which actually required some initial work to establish (pulling cattails and wiping willows with glyphosate). We still spend an hour a year doing this. A neighbor pulls 50-60 BG out a year and a friend harvested this guy last Fall. I throw a few ounces of feed in occasionally to watch the BG feed at a cost of less than $10 a year. I don't feed at all in my other 2 ponds but they are newer and still require more effort to control cattails and willows. I will say that the most work that I have put in on the ponds is learning from this forum to keep me from making common mistakes. However, it's a labor of love!