Honestly, wait. I don't mean this negative, it happens a lot. So think of it as help not criticism. Your tank is honestly overstocked. I have a 75 gallon with great filtration and feel stocked with my single yellow tang. So putting a nem in there without filtration at this point. Your tank has barely finished its cycle and if you add it sooner than a couple months you will crash your tank with a huge ammonia spike. We honestly are just trying to save you the pain of killing everything.