I dont have a perfect understanding if pool chem but I do understand microbology pretty well. The pool wizard was mentioned looked at it and it is another form of Nature2 After doing some reading to look at the N2 I came to the conclution the only "heavy metal" around my will be from my kids cd player. It is my theroy if you have algae you have bigger problems. If you need an algaecide you better look at a more pathogenic bug being in there as well. Chlorine kills it all so why mess with anything else. My thanks to all in this forum that has given their time and knowlage to teach us newbees how to take care of our pool.

Later
Steve