HOB Refugium for blackworms?

I recently saw a few HOB style refugiums that I thought might work well as a blackworm santuary. Water flow is generated by a bubble lift (or powerhead) and the refugium box itself is quite spacious at around 6x6x10". I plan to introduce some blackworms to my newly setup 75g once I get a few more plants put in, and from what I hear they usually last a while, but eventually all get picked off by the fish. My thinking is that if I got enough worms, I could add some to the aquarium for the fish to eat, but then keep the rest in the refugium for later use. Hopefully the worms would even breed (although this is a slow process from what I have read). Any thoughts on this idea? And any suggestions on how to best set it up? Thanks

Here is a link to one I am considering: http://www.amazon.co...ywords=refugium