Hi, I recently started cycling my new 46 gallon tank. My tank and tap water has a pH of 7.9. I would like to get it lower, but don't want to just use a chemical that will cause the pH to fluctuate all the time. Is there any way to do this? Also, how often should you do water changes during cycling? And, how do you tell when the tank if fully cycled? I have a test kit.