what about a needle nose gar can i put one in a 55I would have To differ, 90g for an Oscar in bare min. . I would not keep one in a 75. 75 be great for a JD but a 55 work also.
its all good you've kept a'lot of good fishfar as keeping fish, I kept Oscars, JD, Jags, Sun Cats, silver dollars and BKG, so to speak of anything else as far as keeping them I would not know what i am talking about.