Hi! I put some fish in my 20 gallon aquarium about a week ago - it was all cycled and ready to go. Yesterday, the water started looking really cloudy. I did a 25% water change, but it looks even worse today. I've been looking things up online, but I'm reading conflicting things. One source said to do a 50% water change while another source said to leave the water alone for a few days for it to clear up. Which would be the best course of action? Also, I tested my water, and ammonia and nitrites are at zero, so at least I know the bacteria are doing their job. Could the cloudiness be a bacteria bloom? I'd appreciate any advice anyone can give me!