This is one of my setups.

I am currently running 4 Photoperiods from Barney's Farm, 2 Ayahuasca Purple's and 2 Critical Kush. For my light I am using the Optic 4 XL dimmed at 80%. Humidity between 55-65%, Temps between 24-27c during the day and 23-19 during the light off period. Light schedule is 18/6,hanging at 30",im going to let them reach up towards the light instead of lowering..... For media I am using Canna Coco Professional + with a 70/30 perlite mix. I have washed and buffered the coco and charged it with Eco Thrive Charge. Nutrients I am using is the Shogun Samurai.

My question is why are my plants not growing and it is now week 4??? I believe I had a bit of over watering issues at the start as I had some algae growing on the top of the coco when they were in solo cups and I believe I managed to sort out that issue. Since transplanting them is has been about a week now since transplanting and I don't see much progress. Also used the Michrorizer to help promote root growth but I'm just not seeing improvement.

Any advice?