I would say the same thing everyone is telling you as well. I bought an RBTA quite small and until recently, it was over a foot wide expanded, its tentacles made the thing close to 2 feet. When it was in my smaller 55 gl tank I was asking how to get it to split as it was too big for that tank. It has finally split into 3 nems, I have one littler one, but the other two simply split in half, sit in the same spot and still expand to a foot wide plus tentacles. I also have a smaller RBTA that when I bought it was maybe 3-4". It is now 6" but its tentacles are shorter. This one also split, but I sold it. I've been lucky as none of these have moved in my tank.
I also think your tank is too young for a nem regardless of your parameters. I'd wait until at least 9-12 months before adding.
Finally, throw a picture of your tank up here. We like pictures!
|