It wouldn't be just water, it just wouldn't have iodine. It would still contain the acids, surfactants and other ingredients that work with the iodine, so just adding more iodophor concentrate, I suspect, would result in the wrong balance. It's cheap, why not just dump it?
“Typically the Iodine mixed into solution will gas back into the atmosphere in roughly 12-24 hours, turning back to clear water.”
How should this ‘water’ be disposed of after the 12-24 hr off gassing? I don’t dare pour an Iodophor solution down the drain lest it kill my biological balance in my septic system but can this ‘water’ be poured into a septic system?
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FWIW, I have been pouring mixed, active Iodophor (and StarSan) dow n the drain into my septic system for many years without problem. Considering that the amount I add is meant for 5 gal. And the septic system is hundreds of gal., the solution is so dilute thay it causes no problems. Maybe your septic system is different.
No, mine is hundreds of gallons as well. I just hate to knowingly add a substance that could kill my bio balance. Now knowing it could simply be water after 24 hours I could simply add more Iodophor to the same bucket and not pour it down the drain at all.
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Back when i first started brewing (back in the dark ages
), I kept Iodophor in a closed keg before I knew all the particulars of the product. When it turned clear, I just dumped some more concentrate into the keg. The beers started tasting like crap using this method since I used that same keg for the batch of beer. I stopped doing that and started making up a new solution every time I needed it since, as Rob said, it's cheap. Problem solved. I now use SaniClean for sanitizing because it doesn't foam and will keep for a month or two when mixed with R.O. water (I keep it in a Gott Cooler and check the pH of it every time I brew) (apologies to Craft Meister).
I also just dumped it down the drain to my septic system, along with other cleaning and sanitizing products and have not seen any adverse impact.
Thanks for all of the input from Craft Meister!