If you have any of the hated pantyhose, you can use them instead of a sock. Or a knee-high, whatever. Just not the fishnets.
If you're going by volume, yes, use a measuring cup. No different than measuring rice or flour.
If the volume of granules looks too great for the skimmer to where it might restrict the flow, hang it in front of a return. Or use two socks.
You realize you have ample time to dose the pool to 10 two or three times before bed, right? And CYA dissolved or not won't make a bit of difference after dark, because there's no UV rays from the sun. Every drop of bleach you add in the dark goes to killing algae. Something to consider...
If you're going by volume, yes, use a measuring cup. No different than measuring rice or flour.
If the volume of granules looks too great for the skimmer to where it might restrict the flow, hang it in front of a return. Or use two socks.
You realize you have ample time to dose the pool to 10 two or three times before bed, right? And CYA dissolved or not won't make a bit of difference after dark, because there's no UV rays from the sun. Every drop of bleach you add in the dark goes to killing algae. Something to consider...