Mixed beginner

Thinks went south lol idk think nitrogen toxicity so been flushing with just tap ph 6.5 water. Never had this problem. Could’ve been the water filter I was using too idk quit filtering water since never had this problem with tap water. Plants stopped growing for a few days but are showing signs of improvement so gonna let them keep going. Hopefully they come back. These pics were taken right after watering and spraying with soapy water for pest control.