75g be fine for a JD pair, long as a male and female that are paired. change the HoB to a AC110 and water changes to fin level or 90%. My pair breed like rabbits and do fine in the 75g. just do not over feed. i would post a vid but folks have to be really tired of seeing it.
Naw go ahead and post. I'd love to see it! Unfortunately I don't have a female jsut 2 males. Lol. And I also have multiple fish in my tank.(roommate keeps adding fish despite me telling him not to. So at this point I'm doing 50%+ water changes weekly to keep the nitrate levels down. So i'll need a bigger tank anyways. I'll prob end up rehoming the little jack and keep the big one in the 55 by himself once i get another tank.