I just picked up a bottle of this stuff called wine preserver from bevmo today. I have been told and read a few things about it saying that I will not have to top up my carboy after degassing and clearing if I use this stuff instead. It uses inert gasses to block oxidation. If anyone has ever used this stuff or has any comments please let me know. I'm still very new to wine making and could use some feedback. Thanks again in advance!