Thanks lads, Irishmc their ak47 autos from lowlife...really good growers I must say. Jay thanks for the advice I was thinkin about trimmin them down but it hasn't been long since they recovered so I want to give them a break before their mutilated again, I'm usin a mix of coconut husks and organic compost with total bloom nutrients, pretty good soil mixture anyway so I'm gonna stick with it, might change the nutrients though I don't think their the best, the small plant I'm not lyin since I took the pics and writin this comment she's grown double in height, only around a week too haha she's bigger than the oldest one now.
Managed to find Co2 tablets in a shop for £13 so I'm gonna buy them in the next week or so and get the girls a breath of good clean plant air.