Shit dude! they look great!,keep the pics coming!,try searching the net about your product your using to feed your plants,as for me when ever I use powder or chemical fertilizers I always use less then half the recommended dose,for example,when I use miracle grow 15-30-15 for flowering they say use"1.25ml per 4 litres of water 1/4 teaspoon per gallon I go half that until the buds are big enough to take more as the plant gets bigger I increase the dose but by that time they handle it well,every now and then I get a little fert burn on the end of the leaves,but don't worry a little fert burn won't kill your plant,to much would ,even though I haven't over fed a plant to death yet! but i hear it can be done lol.....I use 20-20-20 for veg cycle and starts about after 2 weeks of decent growth,once again,half the recommend dose!,do a test my friend with one of your plants with the fert you have,even though I would use a fert that has specifications ,something to go by....... do a test mix half the recommended dose use it on one plant! you won't have to wait long for a reaction or not,the very next day it should show if the tips are burned a little or not,if the tips are burned alot over a three day period back off on the dose!.........it's a little science to it,but once you know then ya know!.....good luck....