please help!

Okay so the two plants are in an aerogarden hydroponics system. one is sour diesel one is just regular mids. The suggested aerogarden nutrients is two blocks every two weeks, online it says for cannabis growing it should be less. the sour d is about 3 weeks old and the mids are about 12 days old. put in one block of nutes at the beginning then about 12 days later put in another. about 2 days after put in the other block the sour diesel plants leaves have become moreso yellow all around and some have a little bit of white on them, which i dont know why. also the leaves are drooping a little bit. the mids plant looks great and has dark leaves. Please help, the light cycle is 16/8. filled the aerogarden with more water hoping that if it was from too much nutes that it would water it down. Thanks!



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