Cationic Polymer - Pool Clarifier from HTH -Questions

[smallpooldad]

A few questions.

Does anyone know if this pool clarifier contains phosphates?

HTH hotline states that it contains only a Cationic Polymer, what is a Cationic Polymer?

Has anyone tried it and is it good for removing metals?

Found it at Wal-Mart and it seems inexpensive, although I cannot remember the price.

Found this link (not for same product) for those you who know how to decipher it,

http://www.accepta.com/prod_docs/209...lymer%20%22%22

and here,

http://www.cob.org/pw/water.htm

Seems as if this might be good stuff, or is there a downside?

Looking forward to your replies.

Aloha.