New Member with dichlor question

Amazon is out of the KemTek Dichlor 22lbs. I am not a member of Sam's Club.

Does Costco have a suitable alternative?

I am trying to follow the dosage chart on the extremely helpful "super simple intex pool" guide. Right now I am using the chlorine granular I got when I bought the pool.

membership upgraded; sorry it took so long. We're only now beginning to get caught up.

+ Costco's product is NOT equivalent; they sell one of the diluted and mixed blends.

+ Amazon goes in and out of stock on those products. Currently, they are in stock.