Relevant documents and quotes:

From HTH:
Can I use the HTH® Green to Blue Shock System for my pool?
We want to make sure the HTH Green to Blue Shock System will work best for you. . . . <SNIP> . . .

You will need to be able to vacuum to waste for this product to work properly. This means you need to be able to vacuum the debris out of the pool without it passing through the filter. This product is not designed to work for pop-up pools or pools with D.E. or cartridge filters if you are not able to vacuum to waste.
Emphasis added; see original full quoted FAQ at http://www.archchemicals.com/Fed/HTH...Qs/default.htm .

Two part system:


Full MSDS (2 parts) from Walmart:
http://goo.gl/vwTBBu

Label image, G2B I & II:
http://goo.gl/0ZHMph

Quote from label regarding G2B II:

PRECAUTIONARY STATEMENTS
WARNING: Contains polyaluminum chloride. Irritating to eyes and skin. Do not get into
eyes, on skin or on clothing. Do not swallow.