So I'm setting up a 37 gallon tank I've had in my garage for about a year and I've decided to make it my first saltwater tank. So far I've got the back glass painted black and I have a heater a topfin 40 I'm gonna run as a filter and an aquaclear 110 that I'm gonna use as a refugium. I plan on using oolite aragonite dry sand and a powerhead for water movement. How strong of a powerhead should I get? I plan on starting the tank as a fowlr tank but would like to add coral at some point(probably in the fairly distant future). Also I have a 24in 50/50 bulb for it right now. I plan on upping to LEDs before I add any coral. Any suggestions, comments or advice would be much appreciated.