Thank you all for the quick reply. I was hoping it would be overwatering or overnuting. I assumed it was a diease and the tips are brown due to the heat. I've been taking good care of them all until now but I went on vacation for two weeks which most likely lead to the overnuting. Once I get my green house built next week this should all go much smoother.

Thanks again for the advice. I'm sure I'll be back for more.