Questions - Need some input

I have had my 220 up and cycled for about 2.5 months now... I have 200 lbs of live rock and a 125 gallon sump system. Using a dual over flow running one side to the fuge 3"(sand bed) the other to an INS 450 reef dynamics skimmer. Middle return overflow. (I prefer middle for return...) calcium reactor, as well as a sulfur reactor... My tank specs were perfect up until last week. My calcium levels went from 450 to 550 ... My question is that i have only a couple nasarius snails and 3 ...

Just set up my 220 and cycled water with live rock for about 2 months now. No lights as of yet... Did order the new hybrid 20k evolutions cant wait! However in the sump and two over flows there are tiny white pods. Is the the start of a headache or just copods hatching? Any help would be appreciated.