I've been battling a very persistent mustard algae for two seasons. Despite Super-Chlorinating the pool and maintaining shock levels for very long periods of time, it still comes back after some time. I am now looking into using an algecide, and I'm considering a copper based product by In the Swim:

http://www.intheswim.com/Pool-Chemic...gaecide-Value/

I've read conflicting information about the effects of copper ... Will it damage the my pool equipment, pump, filter grides, etc... ? Thank you.