I understand what you're saying. When I had thousands of cherry shrimp in my 15 gallon it was cloudy like this. It is free floating algae and bacteria that you are seeing. The baby shrimp are able to feed on this. This brings me to the belief that this kind of water is ideal for breeding tanks and overpopulation. I would also do 80-90% water changes and the tank would get cloudy the next day.