Growing in ffof 5 gallon pots,girls are 40 days old using blue planet nutrients ph run off is 7.0 ppm run off is 2670 did I feed to early

Started off in same bucket from germaniotion never transplanted

When did you transplant? Sounds like the plant may have had enough food available. How does the plant look? You may be able to do the next 2-3 waterings as water only.