The bacteria for septic tanks is anaerobic (not requiring oxygen) I
believe, and probably not that good... but if you're not worried about
aquatic life.... maybe okay.
Otherwise, if you want a bacteria/enzyme product I use BZT from
(you have to click on
add to cart, then you'll see the price for 1/2 lb. It goes a long way, has
a long shelf life if kept inside protected from too cold too hot
conditions. It works best though in aerobic conditions.
Seems cows (assuming that's what you mean by stock animals) would eat any
Feel for you having to cart water. Had to do that to a stock tank in
winter, not fun at all. ~ jan
Zone 7a, SE Washington State