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There is good information in that article, but there is a lot of misapplied information. In short, the grad student claims that, in the case of N2, the gases mix essentially IMMEDIATELY. Using this assumption, he claims you need to flush the headspace with 5 volumes of N2 in order to dilute...

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Vineco is the parent company of WinExpert. So you are probably correct -- likely no difference.

That is funny, I have just the opposite experience. I find red kit wines not very enticing, but white kits seem indistinguishable from decent commercial wine. 🤷‍♂️

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I think it is probable that you have been underdosing. Campden tablets contain k-meta, but I am confident that there are other, inactive ingredients (binders, etc.). Yes, Campden tablets are supposed to be used at a rate of 1 tablet per gallon (regardless of whether they are crushed or not).

This is a sealed vessel, correct? Do you have input and output fittings? We had a recent discussion here that is relevant (but I cannot recall the thread, so I cannot give proper credit). How about filling it completely with water (or sanitizing solution. Then displace the water with argon...

Lots of misinformation on the interwebs. Your sources are misinformed. Of course Ar is soluble in water (wine). (Here is one source: https://en.wikipedia.org/wiki/Argon .) In fact, from that source, "Argon has approximately the same solubility in water as oxygen and is 2.5 times more...

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Welcome aboard!

You really owe it to yourself to verify (with some evidence) that you have any untoward microbial activity.

This why I asked. You have us all chasing down the chemistry of Na-meta, etc., when it could just be outgassing.

How did you observe the bacteria? Did they form mats, or perhaps flowers of wine?

I know nothing more about it than you do! You know, ALL art was modern art when it was made.... :)

Well, at least they said "Please"! :)

What was the specific observation that you made that led you to conclude that it had lost its efficacy?

Another day, another Northern Rhone and Tour Eiffel:

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