I also am very worried. I dug up some old substrate on sunday, and now(tuesday) my 25gal tank is so milky I can't see the fish. The fish also seam to be gasping. How long will it take to correct itself. I changed 10 gal this morning.My guess is that by stirring up the detris that's been building up so long, he exposed the aquarium to a minor Ammonia spike which is resulting in a Green Water bloom. Green Water can start out looking like a faint white cloud.
I am from Council bluffs.