Whats up KingSpade...
You have a very nice fat leafed indica... I love the look of fat indica's...but then again I also love the look of slender sativas lol...
Any way... yea... looks like you have some nute burn... but the flushing should help out... in fact.. Since you have already flushed once... wait at least 3 days, then flush again... wait 3 days and reintroduce them to a light nute/water mix... Start with 1/4 of what ever the label recommends and work up from there with each watering.
The schults works, but it's easy to burn the plants since it's really concentrated.
the 20-20-20 would be a good choice... but if you can get some fish emulsion (it's cheap) that would work great for veg.. it's 5-1-1.
How ever... you may want to switch them to flower now... since they will stretch a lot during the first weeks of 12/12.
What kind of lights are you using?
Getting the sides of the grow space more reflective would be a great upgrade... use white paint... or reflective mylar.
also some air movement... a fan or 2
At your local pet store or even at walmart in the pet section you should be able to find a cheap dropper style PH test kit... use that to ph the water or water/nute mix to around 6.0... it will drift up in the soil... the ideal reading for soil is 6.5... test the run off from the bottom of your pot.. it should be around 7 or 7.5.... So water with ph at 6.0 and the run off should be around 7.0
All this only seems complicated... but once you have it down, it's all pretty easy... like you said.. for now you just want to get the hang of things... so think of this grow as nothing more then a learning experience... and the bud you get at the end is just icing on the cake =]
Good luck man... and don't forget to have fun.
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