spotting. .. help!!!!

Hey everyone. I noticed one of my plants is spotting on the leaves. Its only the top fans on one plant, the lower stems and leaves are perfect. (maybe heat burn?) I moved up my lights too. I flushed the plant and restarted my organic neuts. It hasnt spread but should I cut them off (the yellowing leaves) or just leave them? Btw im 6 weeks into flowering. Dunno if that changes opinion. My other plants are doing extremely well and not spotting. First few pics are of damaged fans. Last pics of good plants . First grow!

More of my plants

Calcium and magnesium deficits. Add cal/mag or 1 teaspoon epsom salts per gallon of water.

From my past exp, gold spots like that are usually from lack of Calcium. What kind of water are you using?
They look good otherwise!

Thanks guys !