Sounds like you've been "pool stored". Lithium chlorite is a form of chlorine, but it is one of the most expensive. It won't do anything that plain, unscented bleach won't do. As far as the copper stuff, copper does have algaecidal properties but it is also the primary cause for hair and nails turning green and brittle, and pool liner staining. It also causes major problems for people when they start getting algae blooms that won't clear up--because the cure is high levels of chlorine, and you can't do that with copper in your pool without other additives. So.......my advice? Ditch the expensive stuff, go to WalMart and buyu the $15 drop-based 5-way test kit and several gallons of plain, unscented bleach. Run a set of test numbers on your water with a DROP-BASED kit, and post them here. We'll be able to get you headed in the right direction so that your pool is fun and easy to take care of, and not a drain on your wallet.

Janet