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Question
we have got creamy/white flea/mite all over our fish tank they dart though the water they are everywhere how could I get rid of them the fish are rubbing on thins & flicking so I am assuming they are irritating the fish also our tank has nothing in only fish & sponge filters

Answer
Hello,
Can I get a picture of them? That would help with identification and treatment ideas.
Pretty much every medicine for aquariums intended for parasites should work, but they can destroy the nitrifying bacteria colonies.
Can you tell me what is available at your local fish store and perhaps ask their opinion as well?

Sorry I could not help you yet.