Copper based Algaecide

[mikemass]

Why would one ever use a copper (or metal) based Algaecide? Don't we want to keep metals OUT of the pool? What's the advantage?

 

[JohnT]

There is no advantage due to the drawbacks, and we recommend against their use in all cases.

Copper is a good algaecide, but it has too many negatives for pool use.