First time grower seeking advice!

(3 fems) 4 months old, in flowering for lil over 2 months, fed with fertalizer for 3 water cycles now. Watered every 4 days with a gallon of water. Running a humidifier to keep climate for humidity 60-70% and 70-80 temp. The soil has fertalizer in it, they are in 5 gal buckets. Had some...