Aquaculture

For every 1.1 lbs of feed you give fish, they put on ~1lbs of meat. That's more efficient than anything other than insects, and next best food group is chicken at ~1.8 lbs of feed / lbs of meat gained.

Aquaculture is a fun hobby which improves food security and can give you excellent quality fish.

I'd be happy to offer consultation, designs, or the installation of an aquaculture or aquaponic system.