First, amazing tank.
Second, you mentioned 40 Amanos. I got 40 Amanos for my 65 gallon. I love them, both just to watch and for their algae-cleaning. I live in Japan, and here they are called "Yamato" shrimp, Yamato being a traditional name for Japan.
(My Japanese wife and I agree that they are well-named, since they are such hard workers! They really do never rest.)
Anyway, I think a LOT more than 40 would be good for you.
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