[Help! Substrate White Mold?!]

Then only one I have at the moment as I am not at home 

[Help! Substrate White Mold?!]

Hey everyone! I have and aquariums my entire life and decided to try something new. I purchased Fluval Stratum Substrate and aquarium seed and sprinkled the seed on the dampened substrate and have kept it wet and was told after it sprouts, to add water. I have tons of sprouts but now it’s covered in what looks like white mold. What do I do? Can I save it? Did I just waste time and money, something intend to do a lot lol.