The otos aren't helped because they don't eat hair algae I'm afraid! They do a fanstastic job of the softer green algaes though, as well as being adorable! Shrimp wouldn't help with hair algae either... maybe amanos would, not sure about them, but neos wouldn't.
I can't help much I'm afraid, except sympathise since I battle hair algae in one of my tanks too. Nearly always seems to be problem with too much light and perhaps excess nutrients too, so at least moss is fine with less light!
Also wanted to reply to say what a beautiful tank you have! It's clear you've worked hard on it, and it's paid off. It's lovely.
I can't help much I'm afraid, except sympathise since I battle hair algae in one of my tanks too. Nearly always seems to be problem with too much light and perhaps excess nutrients too, so at least moss is fine with less light!
Also wanted to reply to say what a beautiful tank you have! It's clear you've worked hard on it, and it's paid off. It's lovely.