2 sprouts germ’d in rockwool put into DWC bubblers with clay in net pots using ph down’d water (water source is good) (to PH 6.5+- 0.5)
added some H2O2 and 1/4 strength 10-52-10 plant prod water solulable solid.. used this stuff before, never seen issue, always had nice results.
It has only been one week.
One bubbler is clean.. no issue
2nd bubbler has a ring of white spots (nicely clustered) on the hydroton in the net pot.
Water/nute mix was done at same date, same way, it should by all reasoning, be the same.
Do you think this is reason for Great concern!? Like risk damaging new root by removing all clay cleaning and replanting, or just a simple matter that will be no issue in short time?
So far, a spray of antifungal has been done on the net pot (where spray can reach) spray is no-damp and water.