As things cool, you probably will have less of an algae problem. As long as your pond is warm and active, you can still use the Algae-Fix. I don't like using any algaecides. My two main ponds have almost no algae thanks mostly to lots of plants but also filtration, good bacteria, barley straw, etc. My pond algae page is at
http://www.fishpondinfo.com/algae2.htm