Cuurling and canoeing please help

[pothead42010]

i have a couple plants that the leaves are very dry. the tips are burnt. they are curling downwards and canoeing in. they are in rockwool that is covered with a rubber mulch. they are next to a 400 hps. they are being feed once a day with age old bloom and aquashield water with a ph around 6- 6.5.

 

[cmd420]

Go to the sticky entitled "start here"..answer the applicable questions and throw some pics up and you'll get the help you need..