Opening pool with massive algea growth

[BigDave]

Yep, Maintain shock level for your CC until 1ppm FC loss overnight and > 0.5ppm CC then keep shock level for one more day for good measure.
Sure, go ahead and start adding stabilizer, how do you plan to add? most of us choose to put it in a stocking hung in front of a return.

[Watermom]

I added some to my pool the other day but instead of hanging the sock in front of the return, I laid the sock in the skimmer basket and kept the pump running until it was all dissolved.