Help different plant,different problem?

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The tops are going a wierd colour? I am using biobizz veg and bloom, i gave them some cal mag a few days ago, any ideas what this is?
Cheers
A
 
They look similar to an issue I had a few weeks ago and it turned out to be a lack of calmag, but I'm inexperienced, so can't be 100%
 
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