Just to be safe, I would wait a few more months, and dose phytoplankton in that time. I had a 75 gallon with 100 lbs live rock, 30 gallon fuge, I bought the rock cured and it sat fishless for about 6 months (dosed phyto), then I added a mandarin. He did fine for a while, but after about a year and a half he began to look skinny and I knew he had run out of pods. Luckily I used melevs mandarin diner and he fattened back up.
I'm not trying to discourage you, but just emphasizing the point that they need a lot of pods. All they do all day is scoot around and eat. Also, we are not talking about amphipods here, which are a few millimeters long, but copepods, which are smaller than the period at the end of this sentence.