ak 47 plant problems PICS!please help

very slow growing plant
ppm is about 500
using 150 tap water.
res temp 70
air temp 75
ph at 5.8
fox farm nutes
under 90watt and 150 watt led
i cant figure out wats wrong have tryed more/less nutes higher/lower ph nothing works??? any advise??
 

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dont hit me too hard every body but LEDS grow very slow, unless their the high dollar ones, look into the fox farms additives for a good micro nute to supliment the main nute package.
 
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