Curling leaves brown tips, top and bottom

I just recently switched this plant to flower maybe 2-3 weeks ago and I’ve noticed more and more leaves are curling/falling off. I don’t know if it would be an excess of nutrients I barely have fed the plant but it was having nutrient excess problems earlier in its life. So my question is it excess nutrient or deficiency. I water about 2500-3500 of ph 6.5 water. Humidity is a bit high I need a de humidifier. I have trimmed a lot of dead leaves off
 

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