Was checkin out a buddy of mines grow and he uses the same pots and medium, however mold seems to be growing from the bottom holes of the pot... He does water all the plants in the same bucket and doesnt drain it enough.. Is there any organic remidies that can be made at home or is scraping out as much as possible and watering right after sufficient.... He does allow for the medium a dry period between feeds/waterings so I don't think it's overwatering...

Any help would greatly be appreciated.. Thanks farmers..