I clean my 10 gallon tank every week with a good gravel vac and a 30% water change. After I clean and I pour the fresh water in, the water has a million particles floating all over the place. After about 30 or 60 minutes, everything settles down and the tank looks clear. I have two cory cats that are cleaning the bottom. Am I overfeeding or is this expected with a smaller tank. I have a 15 gallon tall and it doesn't look this bad right after a cleaning. There are some particles floating but everything clears up in about 15 minutes or so.