TheTodd
Aquarium Advice Addict
Hmmm...that ammonia is coming from somewhere. You say you never had nitrites or nitrates, so the tank never cycled? That would mean no beneficial bacteria, which would explain the ammonia spike, but its odd that its not converting to nitrites then nitrates. Your stock does not seem like too much bio-load for an established tank, but could be without enough BB to keep it in check.