I was reading some post last year and came across Nandopsis haitiensis aka Black nasty. i was hooked and finally came across one and bought him up right away. I was raising him in my 20 gallon to introduce him to 75 gallon as sole tank. Everything was going perfect until I came across Fahaka puffer which i ended up buying as well. So now I have a problem, i can only keep one of them in the 75 gallon. Which one should i keep. I am driving myself insane, please help.
