hey guys. i have jus set up a 50g frontosa tank. i have a 3feet cichlids tank too. but for the frontosa tank i have the water running for 1month before i put my fish in. but im not sure why 1hour later after i put my frons in the water become cloudy. and i did i 50% water change last night. this morning its cloudy again!!! why is this happening? help!