What are these spots on my plants????

Theyre in coco under a 250w air cooled hood. About a month old 5.8ph, nutes at 600ppm + 50-100ppm of calmag. temperature is fine. Any ideas on the problems? the first 3 pics are of one plant the last 2 are of another plant.. i dont think its the same problem since the spots dont look alike.

You check out your nutrient levels? Looks like over nutrient burning.. Just a thought since i am not an expert! Good Luck

Yeah 600ppm and 50-100ppm of calmag

I think coco should be 6.5 ph. Other than that bro plant is going well. Plants arnt picture perfect, just like people ,you get some butt ugly ones.

i was told treat coco like a hydro grow and use 5.8

i grow in coco. My ph is always 5.8 or 5.9. Growing in coco should be treated like hydro in some ways... but like soil in other. Soil for the amount of nutes to use... hydro for the ph of your nutrient solution. For a young plant 600ppm seems a bit too much. Try cutting back to 400-500. I'm looking at the back of my nute (floranova) bottle and it suggests values twice as high as I use... because its suggesting for recirculating hydroponic systems. If I check their websight, it gives me much lower amount of nutes to use for what I grow in... and what you grow in... which is a "drain to waste" system. Also, I don't do ppm... i do ml/gallon... so I'm trying to convert everything. It seems like you are not using enough CaMg. I use 5-10 ml/gallon of CaMg. If I'm doing the math correctly... that would be 500-1000 ppm CaMg that you need, not 50-100...?

Yup pretty much.. I use about 1-3ml of calmag/gal.. and im using an a&b fertilizer and use about 11ml/gal of each a&b.

it looks like you aren't giving enough CaMg and you are giving too much fertilizer... look into that.