I'm glad to see this thread. I just registered, earlier today I was in petco with my daughter buying cat food, and my daughter mooned over the fish forever (like usual), and I saw the baby bettas. I thought it would be great, rewarding for her to help care for it and watch it grow...until I got home and did some research online. Now I'm in a panic over this poor little guy. I went back to the store and got a heater, but I'm worried the water is too wam, so tomorrow I'll get a thermometer, and different food. I asked the staff at both pet stores, but got basically zero (or bad) info from both, but I really want to learn more and help this little fish flourish, both for my daughter and for my own motherly instinct. From my research it seems he's 7-8 weeks old. My husband is mocking me because Ive been hovering and doting on this fish all day.