Why are my plants trning colors?

My plants are in there second week of flower and are yellowing from the inside of the leaves to the outer leaves. Any suggestions????

At this point, I've started flushing (X's3) with 6.5 water, then hit w/your bloom ferts (full strength) and 5-1-1 Alaskan Fish Fert (1 TB per gallon) to supply enough nitrogen for the rest of your grow.
Cured my yellowing shortly into 12/12 woes.

looks like your reflective material may be causing hot spots
i'm not sure tho...
what kinda light are u using?

1x400 w
1x600w

Sorry! Its very hard to see whats up with the color of your pics but my guess is you need to add some CalMag to your nutes or spray with epsom salts. You probably have a magnesium deficency.

Sometimes when i dilute my nutes with water and magnesium sulfate (epsom salt)
I put a drop or two of lime or lemon juice to adjust the PH (they also have trace calcium elements)