There is so much to talk about on this thread.
Lets break it down. First, what type of Protein Skimmer. This is the most important piece of equipment and will determine your long term success.
2) Your bioballs are a long term problem and are causing your Nitrate spikes. You need to continue adding additional live rock and remove the biomedia slowly over time.
3) You need to read, read, and read some more on understanding pH, alkalinity, and calcium. All 3 of these need to be tested on a regular basis and adjustments made as appropriate. You can NOT generalize this concept. You need to know EXACTLY what you are adding, what it does, and what you are trying to accomplish. I keep alkalinity at 10-12 DKH, calcium at 420 - 460ppm, and pH at 8.2 to 8.4. I add Kent Marine liquid calcium and Kent Marine Super Buffer DKH when appropriate when calcium is low, or when alkalintiy and calcium are both low. In situations where calcium is correct but alkalinity is low, a water change is necessary to correct the situation. Read, read read, read, read. Start here: Chemistry and the Aquarium
- You will not understand this article. Read it again. And again. Then find other articles on the subject until you know enough to understand how to adjust. This is the most important aspect of marine aquarium care, in my humble opinion.
4) Your Q tank has not been established long enough to use as a hospital tank. I suggest removing the live rock you just purchased, placing it into a storage tote full of saltwater, adding a power head, and CURING the live rock in this tote. After the ammonia and nitrite fall to ZERO in your live rock curing container, then you can add it back to your tank. This practice should be followed for future live rock additions exceeding 10% of your current live rock supply, or any time the live rock purchase of any quantity has a noticable odor.
5) Lower your salinity to 1.013 and raise the temperature to 84F. Begin feeding a garlic enhanced food daily. Continue this for at least 30 days AFTER the spots are gone. Then raise the salinity SLOWLY back to 1.024. I would also suggest that you add a UV Sterilzer to your setup. You can find hang on models at Aquarium Supplies, Pet Supplies and Pond Supplies by That Fish Place - That Pet Place
for an affordable price. WARNING: Do not add any other livestock to your tank until the ich is gone for 90 days. Yes, I said 90 days. TRUST ME on this.