A few days ago I did a 75% water change and I cleaned my filter and tank really well. My water was crystal clear after that but the next day it was really cloudy. I had the cloudy water tested and there was 0 ammonia, 0 nitrite, and 7 nitrate. My fish were all acting completely normal. I then did a 50% water change in hopes of clearing up the cloudy water. It was clear again but the next day it was extremely cloudy again. This has never happened before and my tank has been set up a little over 2 months. The only things I added were some duckweed, a small Anubis on a stone, and some java moss. I checked my filter and it's clean and working properly. I'm not sure why the water is so cloudy. Is there anything I can do to make the water clear again?