dude........drain your tank empty every thing in it wash everything down with hot water and start again.

soap (Surfactant) is toxic to fish.

i will not put my name to saying your filter medium will still be ok either - if its regular sponge you *should* be able to get away with a soak in hot water and putting alot of water through it......i dont know about Cotton etc.

I can only state the facts i know in my first 2 sentence's

maybe some one else can kick in here and give some advice about your filter.

at least the tank will be sterile :P no ick that's for sure

...but if this is a serious post, then wash that thing out thoroughly with -clean- water (ie not disinfected) for a couple of days.

dump your filter media, nothing will grow in there for about a year.
dump your gravel too.
if you have carbon in your filter sell it on ebay or something, it will be useless.

I believe that surfactant is another word for "bleach" so don't keep anything with colours otherwise they'll turn white ;)