Your guy apparently has only heard about the product, and not read about it. It's "C-Pool", not "Seapool".

Here are the links:
http://www.debmar.com/pool/faq.html
http://www.c-pool.ca/
The treatment program is just a typical chlorine + copper program:

from the c-pool.ca site:
* Add 3.5g (1/8 oz.) of C-POOL per 4,500 L (1,000 gal.) of pool water (an additional 0.03 ppm) to maintain a minimum reading of 0.5 ppm Copper. This amount will normally be sufficient, depending on water loss from backwashing the filter etc
* Check Copper reading. Use readily available test kits to ensure copper levels are maintained at 0.5 ppm to 1.0 ppm (do not exceed 1.0 pmm copper)
* Add chlorine to achieve an ideal reading of 1.5 ppm. IF using a Brominator or Chlorinator, fill and place on lowest setting
* Check and adjust pH to 7.2
( http://www.c-pool.ca/howtouse.html )

Ben