Pool rx vs. Blueray xl

Hi everybody, i have a constant yellow algae problem during the summer time.

Do you recommend using any of the copper/silver/zinc algaecides such as pool rx or blueray xl.

I read the posts on amazon about pool rx and it looks like it works really nice "most of the time" i also have heard of blueray xl from my pool guy and sais it works the same or even better than pool rx and it is more economical. I was wondering if anyone in southern california has any experience using bluerayxl?