[Myka]

More often than not, fish that have aggressive tendencies will be much more aggressive when housed in a small tank. Always add the most docile fish first and the most aggressive fish last. The Sergeant Major is not a good fish choice for a 29 gallon tank as they get much too large and much too aggressive when they do get bigger even if it is docile now. I would try to find another home for that fish and start from scratch. A Snowflake Eel would definitely be squishy in a 29 gallon tank and I would only recommend that if it was the only fish in the tank and you did big waterchanges to keep the water quality good since they do eat a lot (and then poop a lot).