White Substance

Question
Hi,
  I was wondering what is this clear substance at the surface of my tank , is it dangerous to my fish?
Will an airstone clear it up or is it very dangerous?

Answer
Hi,
I dont think it can actually harm a person, unless you drink it or something, but it's not very good for the fish. And arstone will work, and so withh a good filter. Just make sure the surface of the water isn't flat or the proteins (the clear stuff) will build up.