Hi that can be normal, but unfortunately I am not familiar with this product directly. I have Monster Bud mix from Zamnesia x Bionova, and it is normal :-) There is also in the instructions that after a few days a real mold fur bidlet should not be removed as it is very useful: -) Take a look at your manufacturer on the homepage, maybe you will find a similar description there :-) I hope I could help you 👍