4oow is ok .. good results with that... but, check the temp....ur very close to 85*......plants stop growth at over 85* for cannabis......heat stress and too strong of nutrients...there still small so..... light nutrient will do.... leach the plants with lukewarm water.......and give them outdoor treatment.mother nature cures and brings amazing results when plants suffer indoors.... please leach the soil and give the plants a breeze of fresh air with carbon dioxide outdoor