I have a new 55 gal saltwater tank. I am thinking about putting in a sump in my cabinet under the tank. Any suggestions on a overflow box and a return pump. I probably wont have a refugium. Just a sump to house some equipment. I have an Escopps 100 hob skimmer that I will hang on the sump. Will this be ok? What GPH overflow and return pump will I need. Does the overflow box need to have more GPH than the return pump? I am new to all of this. I will have a 20 gallon sump. All comments and advice will be appreciated.