hi whatever it is it's dead I'm sure, not going to hatch. I don't know how long eggs stay around for but this it starting to go furry, not sure what it is just looks like tiny bits of cotton wool, it's right next to the heater and something's growing on it. If I didn't know better I'd think it was a bit of left over food - but it doesn't look like any of the food I put into the tank?
Anyway I'll not bore you all with it any longer but if you let me know how long eggs take b4 hatching approx. I'll give it a while longer then just remove it.