My red veiltail betta has passed away this afternoon. There are still his bubble nests around the top of the aquarium. I noticed he was bloated or bigger and wouldn't eat his pellets. Could he have ate snails and that caused him to die? I have mini pond snails. I noticed a drop in their numbers. I would like to know as much as possible what the cause of death could have been. I had him for two years or more. The water was clean. I'll miss him.