"Brooklyn1" wrote
"cshenk" wrote:
"Higgs Boson" wrote

Question: To keep the water barrels from getting scummy or worse, I'm
thinking of adding bleach -- not enough to render the water dangerous
to plants, but enough to keep it safe.

How much per 32 gal. trash can would fill that bill?

1 ts per 5 gallons.

Chlorine bleach evaporates quickly... "1 ts" won't do a whit and
within a couple hours it'll be like it was never there at all.

1 TS per 5 gallons is the USDA recommended amount to render clear water safe
for drinking. With only a 32G container (my fish tank is more than double
that) he's not storing it for long. Of course he will have to reapply if he
is storing for long, but one assumes he knows that since he specified
Bleach.