maybe a stupid question, but I'll have about 40-50lbs of rock that I'm going to be bringing back to life. So apology ahead of time...lol...I plan on bleaching all the rock, completely rinse, thhen place in a 55gallon tank with only a filter and mixed salt water. How will I know when the rock is ready? Some people say something about the smell(rotton eggs) being gone. But is there a sure fire way to tell. Also, when "back to life" am I able to place the 40-50lbs directly into my 100 gallon that already has other rock and fish, or do I slowly introduce the rocks over the course of a couple weeks?