I'm new and I need your help!
Hello everyone! I'm Maria and Im new to the aquarium life but I'm very excited to become an expert! But since I'm new and not very good.
I recently purchased a small HQ Rasbora to add to my rasbora community. Everything was good until I saw this morning that the top half of his tail fin is gone! I'm almost certain I did NOT bring him home from the pet store like that. So I assumed it was bitten off by another fish, maybe the Serpae tetras I have? I have placed him in a hatchery box just in case it's fin rot and needs to be treated but I cannot tell if it's fin rot. But if it was BITTEN off, what should I do? How can I help? Any and all advise is welcomed!