BrewVent is a perchlorate, in the same vein as OxiClean/PBW/etc. That means it's only good for a few hours after mixing.
It's also not a sanitizer; places like AHS are careful to use wording like "BrewVint Cleanitizer is an oxygen-based cleaner". Some people use perchlorates in lieu of sanitizers, and there are endless arguments about whether they're as effective (ie it's just a labelling law issue) or not and exactly how long you have to soak things in them to get full effectiveness. Personally I'd go with a true sanitizer (StarSan, Iodophor, heat).
StarSan will maintain effectiveness for a long time (as long as pH is below 3, usually over a month).
On deck: Little Bo Pils, Bretta Off Dead (Brett pale)
Secondary: Oude Bruin, Red Sky at Morning (Sour brown ale)
On tap: Saison Duphunk (sour), Amarillo Slim (IPA), Earl White (ginger/bergamot wit)
Bottled: Number 8 (Belgian Strong Dark Ale), Eternale (Barleywine), Ancho Villa (Ancho/pasilla/chocolate/cinnamon RIS), Oak smoked porter (1/2 maple bourbon oaked, 1/2 apple brandy oaked)