Help noob with new clones PLEASE!

[stinkyattic]

I too think it was pH. I calibrate weekly now or if I get a whacky number.

Also, I think I had pH issues with the hydrotron pellets (or whatever those little brown balls are). Learning is fun!

Here's the deal on hydroton.
For the first week of use, you can add pH down twice a day or more and it will STILL rise! HT needs to be pre-soaked before use- big tub, air stone to mix, add pH down, go away 12 hours, come back, test pH, more pH down, repeat until it holds stable at around pH 6.
Wrinkly leaves are a common sign of high pH problems.