Wow, great read!
Just remember, not everyone is going to have your same interest in the same fish you like. You need a variety of fish for a variety of people.
Exodons: lol Here's an article that might help you with them. One Tough Tetra: Exodon paradoxus (Full Article) | Details | Articles | TFH Magazine®
a woman came in asking about chemicals to treat green water. i asked her a few questions and found out she was overfeeding and leaving her lights on all day long, 12 plus hours. i actually told her to put the chemicals back, to reduce feeding, increase water changes, leave the lights off for 2 or 3 days, and then to decrease to 5 or 6 hours of lighting a day. she seemed taken back that i didnt try to sell her anything.
you should have at least sold her an algae scraper....
I have to say I do think that what you're doing makes a positive difference. At the awful petco's where I grew up, I wouldn't buy anything. Here, though, they're pretty high quality and so I actually buy most of my stuff there- and considering I have 5 fish tanks (soon to be 9, holy guacamole!) they're making a killing off of me.
i have to see what types of uv sterilizers they have in stock, and will consider suggesting them in the future. i just like to find the cause of the problem and treat that.
I too thought bass?Check out this link: Gallery of Pennsylvania Fishes - Chapter 22, Sunfishes Without seeing the entire fish and fin structure, my guess is a type of rock bass or possibly a Warmouth.
Hope this helps