Hindu Kush. Need info from people experienced in growing Hindu Kush

Hi there fellow members. I need some help with a particular strain I'm growing. Hindu Kush. This is my second grow with the Hindu and every time i get into flower, the plants start to look unhealthy. For some reason during the second week of flower my pH get thrown off terribly???? Down to the 5.0 range. I'm using Fox Farm line of nutes. I understand the Tiger Bloom drops the pH, so the during my feeding regimen, the pH is adjusted after the nutes have been mixed in. pH = 6.5. But run-off keeps coming back 5.0-5.5 range. Only in my Hindu Kush strain no others????? Anyone with info please chime in...

I grew it last batch, didn't have any particular problem. show some pics maybe?

And also, use coco for better results and less problems.

Whats the difference with COCO? I have been using Ocean Forest. Been good to me. Does the Hindu respond better in Coco?

I didn't ave any problems when I ran the Hindu kush either. Actually they were about at low maintenance as possible and they took pretty high PPMs without burning. I'm not recommending that by the way, it was just an observation on the particular ones that I had.