Sudden cloudy water

[papercrab]

I had just fed my tank and lef *** for about 10 mins wje i come back and the water is really cloudy. The water quality hasnt been brilliant recently but i cant think of any reason why this would cause this so suddenly. I dont have any animals that might disturb the sand execpt from some Nassarius snails. My working theory on what happend was that after feeding with the flake food they cam to the surface of the sand and pushed up a lot of sediment. Im not sure about this though as this has never happend before. Any ideas?

 

[papercrab]

My hands where wet so it seems to have ether typed a bunch of asteriscs by its self or decided that im too rude