I'm reading 'What Fish See' by Dr. Kageyama. Very interesting stuff. I wonder this:
1. Has anyone purchased the testing sytem he sells?
2. How does it work?
3. How does the system simulate long distance versus close distance?
4. How does the system simulate cold versus warm water?
5. Is it worth the price? Couldn't you do the same thing with cheap colored plastic filters? confused confused
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Matt