There are no guarantees they will take to a nem. I believe bubble tip are fairly small, as w rose tip. I don't believe there one of the preferred nems for clowns tho.
Male female pairs or a couple females and a male. I have a pair of brown scooter and pair of mandys in my 56 np. 2 males may not be best buds tho lol. Ruby reds don't mix aswell tho. Idk why. I mean w other rubys. They leave normal scooters alone