Hello growing community, i am a first time grower and have been seeing some issues with my plants. These two photo period plants are 7 weeks sense sprout growing in Fox Farm Ocean Forest under a Mars Hydro LED. They have not been given any synthetic nutrients yet but o have started including CalMag in the last two watering. I have not seen any real growth over the last two weeks and the bottom leaves have been turning yellow as well. Please give any suggestions on how I can improve growth and help fix the yellowing issues.
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Do you have a TDS tester to measure the PPM of the runoff? Also how does the runoff pH look?