Need advice for watering problem

Soil: BioBizz Lightmix
Light: 400w HPS, 11/13
Tent: 70cm depth, 150cm width, 170cm length
Moisture: 40-60
Temp: 22-28 celcius
Strain: unknown
Nutes: BioGrow, BioBloom, BioHeaven, CalMag, TopMax (according to schedule provided by BioBizz)
Water: phed water 6.3.

(Week 7 of flowering) I needed to go out of the city for 10 days. Normally, I water/feed her every 5 days and didn't watered for 10 days. When I came back, she was wilted and yellowed. All of the fan leaves were dead and burnt at the tip. Started regular watering and raised the moisture. Also sprayed phed water in the tent to help recover. Now, she seems okay and more lively but there are no fan leaves left. As far as I observed, there are still some time to harvest. Trichomes and pistils are not mature enough. What are your suggestions? Thx :) sorry for photo quality.

Also, there is no smell which may indicate something. (maybe strain, maybe not mature enough)

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