Hey Mate, Servus!
Just had a decent look at your diary. I hope the values for Solution Temp and Subdtrate Temp aren´t for real. If so, your ladies will definately die off. (Substrate should have at least 18°C! Temp for watrering should also have 18-20°C)
Do you dimm your TS1000, 35cm seem to be a bit close If you are on full power.
Personally I would lower th pH to 5.8 too.
Good luck and happy trails for the rest of the way!
Servus,
OimRausch👍