I've already discussed the trichlor with zinc with Ben, and it's basically just a really expensive way to buy trichlor tabs--if you'll look at the prices, those tabs are about 1 1/2 times more expensive than the trichlor with copper in them. The zinc probably won't hurt anything, but we really can't be sure--and I'm not adding anything to my pool that I'm not sure of. You can buy a whole lot of bleach for what one bucket of those tabs cost....

Janet