Feed training redear

I am going to be starting a recirculating system and would like to get some ideas on experiments that I could do.

I will have three 90 gallon tanks for the fish and a 400 gallon tank as a filter. Heaters and chillers will be available.

Here are some experiments that I have thought of so far:

1. Determining if the percentages of feed trained fish goes down once the fish are above a certain size. I would raise fish of a certain size and see if the percentages of feed trained fish change.

2. Determining a diet that maximizes growth.

3. Determining a temperature that maximizes growth.