leaves are starting to twist

I started seed in rockwool and have moved to netpots with hydroton. I just set these up in a hydro top feed system and I started off on half strength GH nutes for vegging and the plants were 14 days old. I have watered 4 times a day for 15 mins and they are starting to have the leaves twist and some are drooping down a little I have no pics but they are about 4 inches tall. Any ideas? I have moved the water schedule back to 2 times a day for now they have only been in system for 4 days.

 

Check out the pics I have in my posts and see if they look similar to yours. I have a similar grow setup only I am using home built aero. With all natural nutes. I dropped my ph by .4 from 6.0 to 5.6, and it fixed my plant just swell. Seems to be in my case that the ph issues I encountered in the beginning caused the plant to do some strange growing. Then all it took was a final tweek of the ph and viola it took off