Fish n chips I agree with you about aeration. There's not electricity at the pond, so I would need a solar powered system but no one here sells them. I should buy every single part online and put them all together but it's not so simply for me here. Also I m not so good with electrical stuff so I would need a detailed list of what to buy and a scheme of how to assemble all the parts together.
For the moment I'll start this spring to introduce a special combination of aerobic and anaerobic bacteria plus enzymes to digest and low the organic waste. According to the ichtyologist I spoke with it would be a good start to prevent fish kills, waiting for aeration.
I consider fun to fish about 10/15 LMB in the 2-4 lb range per day (40/50 times per year, not every day).
If I could get BG it would be the best choice but no one here breed any kind of sunfish.

TPD I can only find same sized LMB and YP at local hatchery (about 7 oz each). I hope YP would reproduce already the first year whereas LMB will reach reproductive age the next year and that, growing together, the YP stocked at first will not be eaten.
Considering all the other fish and craws already enstablished in the pond and the 15 lbs of LMB I'll stock, how many lbs of YP should I buy indicatively?
PS LMB and YP sold are all pellet fed and will be partially pellet fed also in my pond with an automatic feeder.

Filippo