I'll be using Aptus on two of them and GreenPlanet on the other two to see the diference.
The two on the back are Baked in Paris, and the two in the front are In-Z-Air. The left side is beeing fed with GreenPlanetNutrients, and the right side with AptusPlantTech.
Also, during the entire flowering stage I put 3 tablets of CO2 when the lights turn on, with the extractors turned off, for +/- 1 hour, 2/3 times a week.
Had to remove one of the main buds from the In-Z-Air grown with Aptus because of bud rot .. don't know how but I didn't see it progressing and only found it like that. Took that and the surrounding ones 3/4 days ago and so far nothing more has appeared. Gonna start flushing them somewhere this 9th week so I take them out, I'd rather cut them a little earlier then losing most the harvest to mold.
Besides that, when removing the moldy one I cutted a few healthy ones to not risk it and actually left one of the most distant buds (still healthy) to dry and tasted yesterday. No curing, poorly dried and harvested too soon, and still it looked like it will be one of, if not THE best one I grew so far. Really happy with it (: