Hello. Yesterday I bought a new 10 gallon tank, rocks, 2 cobra guppies, plants, and a plastic shelter. I already had a guppy and a mystery snail in a 1 gallon tank which I moved to the new tank. I rinsed everything off before I put it in the tank but this morning I looked in an 1 of the new guppies had died and the water was really foggy. I don't have a filter but I think I should get one. how urgent is this and are my other two guppies in danger?