CK Sour Diesel Auto & Critical Bilbo

June 5 - 'Lil dudes seem to be coming along OK at week 1 and so far no issues with the new kids in the tent - huzzah! Humidity is high here right now and spiked up to about 80-85% overnight when power flickered and my main fan kicked off but no issues with these four related to that yet. Temp didn't get over 80 with the power issue though the fluctuations over the last week have been as much as 10 degrees. With better medium this time (Sunshine #4) I'm hoping I don't fry them like I did my first attempt at a grow. If anyone's using Sunshine #4 and has a recommendation on the exact water pH to tune to before using LMK! Also, should I be adding more perlite to that mix? I have seen some comments that lightening the medium up even more will be beneficial in helping maintain pH as I'll be able to flush a bit easier and use nutes without worrying about overwatering / burning up the roots. Not that I'm at the point of transplanting them to the larger bags anyway but if anyone has suggestions for what to plan for when they get bigger, would love your thoughts! Fingers crossed!!