Need help with an ID please

[diverrad]

So i have been seeing these huys on my glass here and there, very soft some sort of a flat worm,, almost clear, slow moving. At first i thought they where acro eating flatworms but i dont have any acros. any idea what this might be?

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[Ohiomom]

http://www.wetwebmedia.com/fltwmid.htm

here you go a few questions down..

 

[diverrad]

thank you very much.