BTA Size

[Volcano1]

I've had my GBTA for around 10 years and RBTA for around 8. My RBTA has split numerous times since I've had it. It doesn't seem to ever get bigger than
8x8.My GBTA has never split and is now around 24 x 15.
How much bigger can the GBTA get? Will it ever split?
Clowns have always hosted and breed in the GBTA.

TIA,

Todd