My class pet Casper, a Betta Fish was donated by a parent in a 1 gallon unfiltered tank. After accidentally killing him with the first water change, I have done lots of research & now know that a 1 gallon is unsuitable for a Betta. I did get a replacement Betta. I the recently won a 10 gallon tank for my 2nd grade classroom which I have not added fish to yet. It came with a filter and a heater. I'd like to add tank mates but am afraid of the consequences . I've read that neon tetra & corys are a good bet. Would you risk it? Also what is the best & easiest way to cycle my tank?