Some times after I do a WC the water gets cloudy. Is this normal? When I do a basic WC I keep my hob filter on and I use a net with a colander inside to keep the water from disturbing the substrate. When the water goes thru the net it doesn't disturb anything so I know this isn't the cause of the cloudy water. Of course when I need to clean the filter I turn it off. When I clean my filter media I use tank water. I always keep the media wet as well. Any ideas on this?