Things floating at top of tank

Things floating at top of tank

Hi,

I turned on my fish tank this morning and I noticed all these little white/clear things floating at the top of my tank. I have never seen it before and I was just wondering if anybody knows what it is? I know from the pictures it looks like air bubbles but they aren’t. http://www.aquariumpros.ca/forums/sh…095#post316095 and I do not think they are copepods

The rest is here: 
Things floating at top of tank

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