So I finally got fed up with my slightly overstocked 10 gal and constant ammonia levels, and took back my 6 rasboras for a trade in. Kept only my betta and poof, ammonia gone within 2 days. Been fighting it for 2 months. Then, I ignored some sage advice, rolled the dice and got 2 common molly. Boy did that NOT go well with Itchy (that's what my son named the betta). He bullied those poor mollies all day long. He's not itching btw LOL. Sure enough, its back to the store to return the mollies. Lesson learned. Itchy got his domain back all to himself. Contemplating getting a school of neon tetras. Questions: How many can I comfortably stock in my 10 gal with the betta ? Are they delicate picky fish ? Why so many people say that they tend to die off a lot ?