DO NOT SHUFFLE AROUND YOUR EXISTING LIVE ROCK
Your tank is extremely fragile right now and moving the rock could hurt your very fragile nitrobactor population. If you add rock to the trank, only add fresh from LFS very well cured live rock, NO ONLINE SHIPPED TO YOU ROCK and only add 10% of your current total rock weight. IE: looks like you have about 30-40 lbs, so do not add more than 5lbs per week or you may get NTS New Tank Syndrom or a recycleing of your tank. This would mean trouble flor your live stock.
Have been monitoiring conversation waiting for final parameters to come out.
Numbers don't look too bad except your Nitrates and Phosphates are high. Not that unusual for a new tank. You need to control these by three methods:
(1) 10 % water changes weekly or X2 weekly if needed
(2) Proper skimming - You should be pulling lots of gunk out with the load you have on such a small filtration system, if your skimmer is properly set and adequate for your tank
(3) Exportation thru media use such as carbon and your Purigen for Nitrates and Phos-ban or guard for phosphates and I frown on Bio-balls as they can be quite a source for Nitrates and Phosphates if not properly maintained
(4) Test your water parameters daily to see whats working
Also as a footnote be prepared for the onslought of nuseance algea coming your way. First diatoms, then possibly cyano with a sandbed and thirdly hair. Three months is not an established tank. Six months is the norm.