1. dont water every day, water every 3 days. when you feed give them a good watering , and thats it. also only feed nutes every 3rd watering. soil need to dry out some before watering. your plants need oxygen to live just like me and you, if you water every day then they cant get the air that they need to grow, becuase your soil is to wet. you probly right on the lock out. flush you plants with 3 times the amount of water than your pot is. so if you have 1gal pots use 3 gal of water. useing a flushing solution will help as well, if you have some or can get some. i use clearx flushing solution, it works good at cleaning the roots, so they can take in the nutes. after you flush, dont water untill soil has dried up some them start nutes back at 1/8 strieght and work your way up from there.