The 1 common pleco will get too big for a 55 gallon IMO.
You need at least 5 of your tetras and minnows. Too few of them. They like to school.
Your betta may have a hard time swimming in your 30 gallon. I am assuming your catfish are cory catfish? Cory catfish like to be in groups of 5 or more. All tetras should be in a school of at least 5. They will school together but they prefer their own species.
I think you have some work to do stocking wise. I'd make a few decisions on what kind of tetras you should keep. What are your water parameters?
That's my opinion.
Good luck on it!
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