Hot take; Proper germination does not need sterilisation, fungicides or algaecides.

Ok so I've had this belief ever since I germinated my first batch of seeds and my recent attempts I have had this belief soldified.

I've had peyote tubs of sterilised substrate and washed seeds troubled with mold (algae I find even when sterilised substrate is easily fixed by correct moisture levels).

Thus far providing high humidity, good airflow (humidity cabinet, not a tub) and literally nothing else has worked awesome.

See pic of my new Peniocereus seedlings.