"Snooze" wrote in message
...
"Robin" wrote in message
news:nq2qe.40919$xm3.27198@attbi_s21...
My aunt has a 1250 gallon pond with a skimmer and UV
light. Apparently her UV light went bad and her pond
turned into pea soup. All of her fish died, I suspect
from lack of oxygen; but they assumed it was the algae.
My well meaning but misguided uncle poured a gallon of
bleach in to kill off the algae (at least he took the
plants out first.) It worked, not a hint of algae in the
pond, LOL. What will have to be done to make this pond
fish safe again? Will it have to be completely drained
and scrubbed? Would a couple of near total drainings and
refills followed by dechlorinator work? Ideas?

I suspect a single near draining of the water will be
enough, combined with a few days of running whatever water
circulation to let the remaining chlorine evaporate out.
and of course some dechlorinator would be enough. You
didn't say if this was liquid chlorine, like the kind used
in pools, or chlorine bleach for laundry use.

A gal of pool chlorine is a higher concentration, it might
take a few drain/refill cycles. The biggest thing to
remember is time, aeration and water circulation to let
the chlorine evaporate out.


It was regular household bleach. Thanks for the advice