I recommend that you seek information about what is cultured locally. You might check if those species are also cultured here in the US by doing a search on "SRAC". They have very useful information on fish culture. You live near the Mediteranean Sea? That's not far from the Sea of Galilee which is where blue tilapia are native. They feed at a lower trophic level than bluegill and your pond would support a greater weight of them. If they are also cultured in your locale you could source them locally. In a pond that size you could easily grow 40 lbs of tilapia with supplemental feed and without aeration and maybe 20 lbs without feed. You would only need to stock 20 to 40 males each year and might be able to culture your replacements each year from an indoor culture set up.

Last edited by jpsdad; 03/10/24 08:45 AM.
It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers