I have a 55gal with 3 tiger barbs, 1 rainbow shark and a candy striped pleco. What will get along with these guys and not hide all day? I prefer something not aggressive. I started with 7 barbs -3 died I believe from being harassed by the others and I put 1 in a 10 gal because he wouldn't let up. I believe all deaths were female. What can I add?