Hate to show my plants like this but

These things are going down fast is this a potassium deficiency or mite burn or something else? This is driving me crazy it’s happening to all plants

Hard to say, but to me my first thought was heat issues. Maybe a salt build-up too? What are you feeding, ph etc...? I see curled up leaves on the sides, which makes me think heat/light burn. But I also see curled up leaf tips and burnt leaves, so probably needs a good flush... Also could be overwater maybe. I see curled down leaves as well...

Nute burn I meant

Yeah it does look a lot like nute issue/burn

Here’s the thing I did this grow with severe lack of equipment and the only flower nutes it’s recieved was an old chunky bit of tiger bloomi had I think my plan will be to flush and add fresh lite dose of flower nutes

Ok it’s fungicide burn green cure cooooked them dam after I flushed too wooooowwww