bang guy
Moderator
No. The buffer thing is one of the top myths in saltwater.
If the Alkalinity level in your system is low then by all means add some buffer to your topoff water. Never add buffer to the water you're going to use to make saltwater. But if Alkalinity is not low then adding buffer can only harm your tank.
If the Alkalinity level in your system is low then by all means add some buffer to your topoff water. Never add buffer to the water you're going to use to make saltwater. But if Alkalinity is not low then adding buffer can only harm your tank.