I.H.G Freebie grow

P.D. No.1 and 2 Are couple days apart. Flipped on day 32 for no.1 which was day 25 for no. 2. No.1 is getting leggy. Pink/purple tinge to stems of her fan leaves. No 2. Is still short width is developing but height not catching up. (I suspect this could be male) No excess or deficit at present noted on foliage. Set up is 2 twin auto pots and one single. Have a 40l reservoir (for twins) & 25 l reservoir for singles (I can manage closer feeding ><) Have stared feed regime from scratch building up as ppms went through roof when I put pH down in reservoir. My tap ppns can fluctuate from 300 to 550 and yep...1st time filling 40 l res taps was chucking out 550. Weekend & hydro shop shut (I don't use cal mag) so ratio was 3/4 RO - 1/4 tap then with just 1/2 dose of grow nute ppm was 1000 pH 6.1. Left that just as it was plants love it. Will get better pics of 1&2 and post in next few days. (Old phone so pics bit poor quality)