First Reef Tank. HELP WANTED AND NEED ED

So I Have A 55 Gallon Tank Currently Have About 10 Pounds Of Tufa Rock And 10 Pounds Of Cured Fiji 2 Pounds Of Premium Fiji (Planning On Adding More Slowly. I Check My Water Levels every 3 to 6 Days My LFS says my water levels are great but Nitrates are high but it's because my tank is new I did some reading and heard that macro algae would do the trick BUT WHERE TO PUT IT I don't have a sump or fuge