My GDA is on the plants as well as the glass. It makes it much more of a nuisance. I'm decreasing the photoperiod to see if I can get rid of it.
Rub a leave that has it between your fingers. If it's slimy it's likely not GDA and could be a type of BGA (cyanobacteria).I'm not sure which green algae is on (some) of my plants. All I know is that it is green. I also cut back on duration and cut out my midday burst. It has helped a bit.
The graph is for plant photosynthesis absorbtion rates for the different chlorophyll and such that plants use in the photosynthesis process. I think I got this graph off of a university website site that was doing experiments on photosynthesis. Over the years I have collected many different graphs while researching plants and lighting. I'll see if I can find the website. It was a good article as I remember.Newt, just to clarify is that graph for the cyano or for the dust algae? I've never read about that before, pretty interesting stuff, do you have a link to a larger article? I'd like to read more about it.