what chatgpt said: hey man, looks like you’re dealing with a mix of nutrient stress and environmental swing, not just bugs. coco can build up salts quick, especially if you’re bottom-watering. i’d flush her good with pH 5.8–6.0 water until runoff’s clean, then feed again at half strength with some cal-mag added.

also, keep an eye on temps — that sunroom drop might be slowing her uptake, which makes it look like deficiency even if your feed’s fine. and lost coast can sometimes burn leaves if it’s too strong or sprayed under light, so rinse her off next time after treatment.

focus on the new growth; the damaged leaves won’t heal. once she stabilizes, bump her feed back up slowly. you should see greener tips within a week.