So I never had a saltwater tank in my life. currently have a 20 gal freshwater tank in my shop that i put together just because. mind you it has no fish just looks cool. Back to point, I decided to build a plywood tank it looked fun to do and i like building things so I am going to build a 148.8 gallon tank that i intend to use for saltwater. now I know I want to put together a wet/dry sump underneath the design I have in mind is based loosely off the aqueous proflex my question is I only intend on having a few fish possibly an eel or something of that nature basically want colorful rocks coral plant atmosphere what equipment is necessary from the start and what can wait?