Mine doesn't smell like vinegar lol. Not sure what it smells like, but it's original, and yes it does stink. Almost similar to some fish fertilizer.
Here's an idea. what if it doesn't even do anything and they are just making each new batch out of random shit they throw in? LOL. Check the ingredients on the bottle and tell me if you find any.
have yet to use it.. been like x-mas over here the last week! got my FF trio in the male, PH and TDS meters in the mail with calibration solutions, superthrive came, waiting on calmag, rockwool and netpots and hydraton and i can start! all will be here by friday! gunna mix up some super thrive for some strawberries i have under my lights at the moment.