What is this white fuzzy stuff?

Hey all,

I have a Letpot hydroponic system that I bought a while ago. I’ve noticed that this white fuzzy cotton-like material is growing on top of my plant pods. I assume it’s some sort of mold or fungus. Is this anything to be concerned with?

I typically clean and sterilize the tank and pump once a week and refill with fresh nutrient solution close to the “max” water level line. I currently to use General Hydroponics FloraGro series for my nutes and I also add Southern AG Garden Friendly Fungicide or Hydroguard along with Hygrozyme enzyme formula.

I have struggled with root rot issues in the past prior to using a fungicide but not sure how to prevent this white growth from forming on my plants.

Any feedback would be greatly appreciated. Thanks!