I recently thought that my betta fish might be a bit bored, so thought I'd get a couple of neocaridina shrimp in the hope he'd enjoy following them round. Big mistake! He immediately went straight to attack mode, luckily they were too big and too fast for him to catch but he was absolutely relentless! He didn't stop until I'd netted them out of the tank, and even now he's still stalking around the tank, it's really awoken his killer instinct. Luckily I have a community tank the shrimp can live in, but I've decided that given the exceptionally aggressive nature of my betta I'll get him some live food instead as he should enjoy the hunt. I've ordered some daphnia, does anyone have any idea if I can keep some of them alive long-term as a constant food source? Bearing in mind I am in a flat so space is at a premium and I don't have space to set up a whole tank for them.