I don't use algaecide. PB came and opened our pool yesterday and left a bottle of algaecide that he apparently used to dose the pool. I can live with that, as long as it isn't copper based. I'll just go back to BBB like has been working for me for the last 7 years. The ingredients list on the bottle is long and is just chemical names. I don't see the word copper on it anywhere. It is Hydrotech Swimgard. Can I assume there's no copper in it?