Looks like you have some rusty leaves starting on this plant also. When I was using fox farm lineup and having issues with overfeeding there was a line of thought that really helped me out. A plant will only uptake what it can use to aid in Photosynthesis. Nutrient companies base their recommended dose based on a 1000 watt or greater light source (watts from the wall). So if you are using a 250 watt LED (watts from the wall) you should only feed 1/4th the recommended dose. Furthermore, You should divide that dose by how many times you water in a week. I see your tag on some pots say "Feed, Feed, Water." That would make each feeding 1/8th the recommended strength.
Give these video a watch, Some good info.