What are these from?

[pop22]

He's growing in a fairly nutrient rich organic soil, he shouldn't be feeding nutrient solution IMO. Simplest would be to top dress with a little more OF.

Looks like calmag and I'm going to bet you're running into phosphorus and potassium issues now, if not shortly, from distilled water only no feed. You need to start giving a nutrient solution for bloom now.
I'm late to the game, but I was summoned with a tag by a new member so i figured I'd reply. Quote me or @MissUniverse to summon me if you need me I'll gladly explain what I know for you

 

[MissUniverse]

He's growing in a fairly nutrient rich organic soil, he shouldn't be feeding nutrient solution IMO. Simplest would be to top dress with a little more OF.

And there I have knowledge learned. I would not have thought to top dress that soil. Thanks @pop22 for some knowledge gained