Stem thinning/ leaf discoloring hydro

Growg

New Member
I’ve been growing hydro and one of my plants has been thinning out and developing soft spots on two of the leafs, EA964173-AA15-468A-B8DA-DAD81D8D82AA.jpegB1CF5269-D2DD-4383-B394-F8F41469477B.jpegany ideas of why it’s happening?
Ppm is 760
Ph is between 5.5-6
 
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