As you can see on some pics of week 5 the 2 topped...

Your plants definately are clawing I would stop giving them all nutrients. If it was my grow I would give the ones that are clawing a bit of a flush until my runoff ppms were in the 600-750 range regardless of the fact that you are using organic nutes. Then let them dry out a bit before the next watering if the leaves straighten out before your next watering add 1/2 strength nutes. If they continue to recover then increase the nutrients gradually. What wasn't clear was it sounds like you water every 5 days? is that correct? If that is the case what may be happening is you may be waiting too long to water and as the soil dries out the concentration of the nutrients increases in the soil causing the toxicity. I would get a TDS meter to monitor the runoff ppms and ph in the future to make sure your plants are feeding on what your putting into them and it's not building up in the pots. Try to check your runoff once a week. You can either lower your nutes and feed every time or alternate with plain water in between feedings. Hope this helps.👍