I hate the BLUE liquid UP. I use some Earth Salts (little frog on the label) an organic up.
But here is the big problem I think. You could have the same issue I had water level too high and roots and stems roting. That causes the ph to drop too quickly. Can you feel the bottom of your stem is it moist? Are the leaves drooping?
My quick fix drain 20L replace with 8L RO. Keep water level lower. and get lower and lower until harvest.
Peace,
I keep mine at about 1-2 inches below the net pot.
Good luck with the temps even if they rot your still good with em been so close to finish happy harvest.
hola amigos
im worry because i dont have any flora bloom and this is a problem.