I took a quick look and it seems it adds copper to the water to help prevent algae growth.

Personally, I wouldn't use it. Copper can stain your pool and turn hair green. Also, while it does help prevent algae, it is not a good sanitizer.

If you can't find someone to add bleach for you, perhaps you could add enough before you leave to last until you get back (how long will you be gone at one time?).

If you want to add an algaecide for extra protection, the only one recommended here is a 60% polyquat such as this;

http://www.amazon.com/Kem-Tek-KTK-50.../dp/B0030BEI0Y