Repacking Boyd Chemi Pure in Small Bags

Wanted to get more Boyd Chemi Pure Plus since it seems to work well for my tank. Trying very hard to keep phosphate down, etc. Problem is that Chemi Pure is priced horribly. If I want to get the 3.1 ounce size container it's like $8. Twice the size is either the same price or $1 more. Four times the size is like $13. I don't know why you can't just buy the large jar, open the bag, and then repackaging the chemi pure into manageable bags. I see Boyd sells its own filter bags. Anyone do this? It's cheaper to even buy their bags and repackage their own product.