Does it matter how long the tank is maintained in this small little window for the photo?
Not to me.
The attainment is the goal, then you scape it all and go back and do another.
I highly doubt these tanks are the same for years and years, they evolve and get redone.
He'd run out of space every month
2 ft tanks are very good since they are very manageable/easy to rearrange.
Regards,
Tom Barr