Hope your girls is allright with the droopyness. The girls i had this on responded with better growth and health after changing from PH 5.8 to 6.2-6.3.
Give it a try if your girls isnt better. For me it worked really good.
I raised the light and they're okay now.
As I already said, I pH to 5.7 and let it drift to 6.3 so they're getting all nutrients.
Will update soon...