I had a friend over to check out my new big boy and she was playing with my cat. Well, when you play with my cat you use a laser pointer. She accidentally (on purpose) aimed it towards the new tank and you know what? The betta started to chase it! Which is weird because he doesn't eat the ghost shrimp that live in there with him... But whatever. I was reading that giants get lazy as they get older, so I am happy to have a way to exercise him. I don't do it for too long, just a quick movement through the water to get him looking and swimming around. And of course, careful to keep it out of his eyes. Anyone else have tips for exercising their fish?