Skinny new leaves

[nmbfer8971]

Hi I have been growing clones for some time now and I started to notice some of the new growth thats coming in the leaves are getting really skinny and long. Normal growth will grow out beefier and bushier some of the new growth is not opening up. Temperature is staying around 75 and humidity at 30 give or take. I feed them nutrients by general hydroponics. And when I do water I have 8 clones that are about 1.5 month old how much water amount should I be giving the total 8 clones. Half a gallon, 3/4???

[Colombo]

Hello nmbfer8971, can you provide a photo without the lights on to get a better look at your problem and a rundown of your water/feed schedule, nutes, lights ,pot size etc. They all feed off each other and helps with diagnosing problems.