Thanks for your help. Immediately after treating the algae my mechanical
filter would clog twice a day with brown mud like consistency. I assume
this was the dying algae. Now the filter is running clean, the pond is
clear and no string algae on the waterfall rocks. The only thing is I can
not see the bottom with all of this fine bright green hairlike algae.
Although I got most of it just by going into the pond and skimming the
bottom I am afraid it will just come back. If it were the dead algae would
it not be bright green?