Please help is this a deficiency or burn

Troubleshooting
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Rdwc advanced nutrients veg schedule for the first two weeks of transition ppm 800 dropped to 550 going to go higher today 950 for my water change strain is San Fran valley og. I also have granddaddy purp in system doing very well. I use r/o water and add cal mag of course please help

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Ppm of calmag is 320