I have been struggling for the last 2-3 weeks cause of my plants ( bruce banner 2.0 ), and also my 3rd grow of the same seeds, suddenly stopped smelling to anything other than "Sweet".
Have been checking PH for 2 weeks, did a flush 2 weeks ago, added extra PK according to the recipe ( canna ), and still, they have no smell BUT...
They DO SMELL outdoors on the exhaust (bummers) sometimes, I need to seal the Carbon Filter to the fan with tape, but that aside. At certain times of their night ( my daytime ), they usually stink for about 1 hour and then they stop. And during their day ( my night ), they almost don't smell, I spend my nights checking constantly for the smell inside the tent, I clear my senses with coffee, I ask my GF to go check for me and I worry about having COVID lol.
If I come inside when I perceive the scents outdoors, they don't smell even inside the tent. If I turn off the AC and extractor, they don't smell for most of their day, except at random times but very mild.
I am up to the point where I am waiting until around 1am today to see if that matches the high tide, cause today there where stinking at around 12:00 am, and then stopped, and only outside.. ( drives me crazy )
I was also thinking and researching to see if the terpens may perhaps react when they perceive a sudden change in tempo or RH, cause inside they are usually at 23C, but outside it gets up to 35Cat noon, and also RH levels are way different.