I opened my pool without a hitch until I went to vacuum.
I brushed everything toward the deep end the first day, and much of the crud settled there. After a day, I went to vacuum and had huge clouds of algae shooting out of my returns as soon as I hit a patch with my vacuum.
I assumed I had a filter problem. I just got done taking everything apart, and it's flawless internally. Sand is smooth, clean and completely loose. Multiport is uniform and installed correctly.
So, anybody have a suggestion for what I can add to the skimmer to check filter operation? The algae is pretty well gone now, so it's not an option.