Hi
@rudy_outman! Yes you can remove the crispy/brown/dead leaves, but the question you should ask is "why do I get those symptoms". And here's a clue: your plant looks very dark, I guess it's because of a slight Nitrogen toxicity, probably because of FishMix. Now that she's in the end of her flowering stage, I'd recommend to slow down on FishMix doses and Nitrogen intakes, all she needs is some PK booster and much love 😉Also, I've seen some thrips marks onto your dead leaves, this could also explain why some leaves are having issues. Hope this will help, keep us up-to-date and happy growing 👊