I am glad your lone Oto has some new friends. I know many think of them as just part of a clean-up crew, but I honestly adore them, and think they are fun addition to any aquarium. I love watching them shoal together, or perching on leaves.
Looking forward to your next update and seeing how reducing the intensity of your lights improves things. As I am getting ready to plant tomorrow, and finally turn the lights on my own tank after a lengthy dark start, startup lighting intensity is something I have still have concerns about. I never thought much about it when I ran T-5 fluorescents. I haven't quite managed to pull the trigger on an Apogee, although in a perfect world I would love to, but after reading about the Photone app on other threads here it seems it is more accurate than a cheap PAR meter. Now seeing your post, and that your phone survived the plunge

I really should do this. I just don't trust Ziplocs because I have had them leak! Did you use the paper diffuser method, or the Lightray diffuser accessory?