Those would be my best guess.
Tilapia grow to plate size in 9 months. If you start them in February, they can be in the freezer by October, minimizing how long you have to heat a tank. When we get fully running, we will winter over breeding stock and run our winter garden off just that tank, then have a larger system that will run while we grow out the food fish.
This is the article that got my posting privileges revoked:
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