An update on a little progress.
Here are two photos.
From the start of the algae problem.
After some Excel and H2O2 treatments (July 1, one photo with flash and the other without).
3 days from the former photo with continued Excel treatments (July 4, one photo with flash and the other without).
Improvement. I have also seen some thread algae mixed in with my java moss and I am manually removing that and treating some other leaves on my crypts. with the Excel and H2O2. Now I am going to do a thurough cleaning on the glass and filter pipes to get the GDA off. I'll update with more photos of the whole tank later.
Thanks for all your help and advice, everyone.