JSlade thanks for the feedback. I looked up the sago pondweed and it does look like that is what I have. I've been manually removing the weed now with pond rake and that seems for now to have stopped the algae bloom from re-occurring also. Prior to removal of that pondweed I would remove just the FA on top of the weed and the FA would be back in full bloom within 3 days. Hope this tip helps others, remove the pondweeds underneath the FA bloom first, at least works for me so far.
