First grow. Are my plants okay?

Hey guys I could use some help. A lot of my leaves are turning a blueish color as well as some purple/red. Is this a phosphorus def? Should I give more bloom nutes? I just fed a day or two ago. Maybe this is past damage since the tips of new growths are yellow (I've had some heat recently like up to 85-86 degrees + plant stretch so that could be light/heat too).
 

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I'm getting some yellowing on new growth as well as some brown spots. Anybody know what's going on? I thought it was too much nutes so I've been giving them water only. The problem seems to be getting worse. I've only fed them 3 times in the 6 weeks they've been growing. Deficiency?
 

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I had plants that were yellowing in a hydro set up and thought I was over nutes kept lowering strength finally said fuck it through in a bunch more just giving up... Plants thrived...adjust your nutes and see what happens
 
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