they really are such fun to watch!
I am very temped to add two more females after Christmas sometime. Since we are down two guppies, there is some space now. I think two is better to add than one though (enabling aside) to keep the newbie from being picked on. If I got two new girls, then there are two new ones, rather than just one. I also plan to QT the new girls before adding them, the critter keeper will be handy for that. Also plan to remove everyone when the time came, and add the new ones in first before the existing four.
I really should wait til after Christmas, but there is this little lemony yellow girl at the pet store,... :\