just curious, u know that White fluffy looking mold that sometimes will form on old food as well and in time turns into a green dot?

a couple of years ago i had a home made test hydroponic system setup in a really moist weather [with avg humidity of about 50% year round] and it was perhaps the wrong type of soil i used which retained lots of water from tank to the point it remained completely wet and moist at all times, but within less than 48 hours of setup i had the white mold all over the soil inside and on top and my test legal seeds didnt even get to come out so project was cancelled. i even used some fungicide but it didnt help at all

was wondering if solution for such mold is available in plant chemicals introduced here cuz i couldnt find it mentioned! :/