I have been
using it for 7 or 8 years on a weekly basis - prior to that, I had
filamentous (sp? - string0 fish 3 koi, rest various GF in ~ 1000 gal US)
as
are most backyard ponds - I should have ~ 8 or 9 GF, but I gave up trying
to
maintain that amt., and I love my many pets :~)
Gale :~)
Hi Gale, I'm interested in what you use as a beneficial bacteria.

Hi Nan - I use Bacta Pur Klear and / or SludgeBuster - A $23 Can bottle
(liter) does me the whole season (~1000 gal US) - I run out about Sept,
but the pond bottom is clean and string algae is long gone. I no longer have
to keep dealing with the sludge (mulm) on the bottom of the pond. The
bacteria additive eats it up, as well as what ever was feeding the string
algae I had. It seems to give the pond water a polished look. Jan used a
different product, but I can't remember the name - Jan?
Gale :~)