Square One Genetics wc x bbc, bbc s1

I forgot to update last couple weeks so here we are. Well they went through some decent transplant shock for some reason but bounced back over a few days. It could also have been a ph fluctuation. I noticed my ph is rising after the res has been sitting for a few days (with 2 air stones) I’m not sure what causes the rise. (7.2) I took the ph perfect line for granted and only checked it when filling new res. So may have stressed them with a big difference in ph? Anyway, Plants are happy now with flush and ph feeding of 6.2 I know ph perfect puts it at 5.8 but I feel that’s just a tad low and plants do better above 6. With the promix hp anyway But I’m no expert. Any ideas, please share!! Thanks for looking!