Leaf Discoloration

[Mt Toaker]

Any idea? They are in a soil mix of the following.

6 Gallons Perlite
14 Gallons Peat
1 cup bat guano
1 cup dolomite lime
1/2 cup fungus/bacteria mix(can't remember the name of the product off the top of my head)
2 cups Kelp Meal

Temp is between 75-80
Relative Humidity is around 60%
Under 1000w MH HPS hybrid bulb on a 20/4 light schedule.

Any other information you need I'll be happy to provide.

I just fed the affected ones with Liquid Karma and Maple Syrup. We'll see how they react.