Harmful mold?

[MaryL]

I planted this kit AG chives, and within a couple days the top of the sponge was covered in white stuff.  It’s worse than the pics show, and it goes a teeny bit down the side of the sponge too.  I think I remember that, like algae, this is probably not really a problem, but wanted to double check.  I don’t want to contaminate the rest of the garden.  Should I toss it?

[Shawn]

Before tossing, try dipping a Qtip in peroxide and lightly graze the surface to destroy what it white. 

Then give it a few more days to see what goes on.

[MaryL]

Oh right. Ok I’ll try that.  Thanks for reminding me!