I changed 100% of my water every day for two weeks and the ammonia level was at 0. Yes, it was a true pain in the ass, but I planned for it and it was totally worth it. Every day after the two weeks, I checked for the ammonia and it still stayed at 0. After placing the soil in the tank and scaping it, placed the empty bag on top and fill it slowly like that. Little to no cloudiness had occured in my experiences.