People love to leave out the "also" in the not only/but also pairing. Not sure what they have against that four-letter word, but let's put it this way: if it were playing kickball, it would be chosen last. Every. Single. Time.
Example
Shmoop HQ is not only raucous, but it's also productive.
OR
Shmoop HQ is not only raucous, but it's productive.
Door #1, please. Without the also, you're not technically in the grammar-right. Sure, every single person on the planet will know what you're saying, but that's not what you're here for.