Instead of 8 Denison Barbs ... maybe do 4-6 ... only because they do get up to 6 inches long. None of my 3 are larger than 3inches and they quickly go from one end to the other. That and they can be up to $30 a pop ... but sometimes you find them for $15. I'm not too familiar with the Black Neons ... although I am considering them for my next tank ... 14 should be ok ... maybe lower it to 10 worst case ... IMO
I can't comment on ottos ... I've also considered getting one to deal with my Brown Algae issue ... It's really not a bad stocking choice.
75g Planted Barbs Denison, BlackRuby, Tiger, Albino Tiger, Green Tiger, Cherry, Gold, Checkered, Odessa.
NonBarbs Cardinal, Neon, RummyNose, Bloodfin Tetras, Z. Danios. 1RTS. Amano, Bamboo, Ghost & RCS. 20g Long Shrimp Tank RCS, Tiger, Amano.