All Tips Curling Up and Tips Turning Dry

Anyone know what nutri causes tips to curl up and dry out? I dont think its heat because it has never gotten above 78. I did change my res about 3 days ago so I think it has to do with nutri

Too much nutrients will cause nutrient burn, doesnt really matter which nutrient in particular, you need to check your ec or ppm and make sure its within the range the bottle recommends if its an established plant, quater strength for a newbie =] my ec is around 1.2 - 1.3 hope this helps!

Just re read your post, i didnt see the part where u asked which causes the curling. Sorry bro! I just woke up and punched a billy hopefully someone else can help as i would like to know too =]

Supz Jumpin. First of all, how old are your plants? Your setup specifics would help as well as pics if you can get em How far away is your light from your plants? Too close will cause them to curl up from the heat. Nute burn is more of a yellowing of the edges of the leaves. Ventilation and moving air should help as well. More info you give us...the faster we can help ya out Happy growing!