If you start flushing you can pH up your water to 8 / 8.5 .
Mold is a kind of microscopic mushroom, it's a parasite, it feeds itself with the chlorophyll , and it can't live on a basic environment, switching your water pH from a acid to a base will avoid getting mold ☝️
You can have a happy growing now 😉
P.S: Normally Autoflowering are supposed to be strong enough against mold with Ruderalis traits
P.P.S: Don't worry for your pH , pH lock out does not exist trust me !
likes 3