I used LT Metal Gon on initial fill up and I've been using LT Defender at least every two weeks.  It's now time to refill and I was wondering what other chemical company makes a product similar to Metal Gon that I might be able to find locally.  A couple of different dealers tried to sell me Pool Magnet from Bioguard as a replacement for Metal Gon.  I was told that it could be used in place of both Metal Gon and Defender.  From the label, it looked to me to be more of a replacement for Defender.  I was hesitant to use a chemical that only required a couple of ounces per 500 gallons when I used the whole 16 oz. bottle of metal gon on initial fill a few months ago.
What I need is a cross reference chart for different chemical companies  

Any help would be greatly appreciated
Take Care,
Gil