Hi this is my first post setting up a 500 gallon aquarium in my business. I need help with what pumps to use and which filtration system is best for a 500 gallon. I included photos of my tank so you can see how the plumbing was ran by previous owner I bought the tank used and figured I would go to the experts for help. I am new to this hobby so please forgive me if I don't know what they are but each side of tank has an internal compartment which I believe I can use please see attached photos Thank you