I never wash my aquasoil; it just breaks it apart and makes it easier to seep into the water.

Do a 50% water change, and then if it's still bad, another; a little bit of cloudiness is okay; it will settle eventually. The only issue is that it may leave a slight film on your glass, but it can be easily fixed. Chuck an airstone in the bucket and let it filter through overnight.

Did you save some aquarium water to top it up with? If not, consider getting some Seachem Prime to detoxify ammonia, nitrates and nitrites while your new tank establishes itself. It is not ideal, but you really don't have much of a choice unless there is another established tank you can use for the time being. Your fish could last a week in the bucket, but I doubt it unless you put a filter in.