1 U.V. or 2?
 

For all of you that had pea soup, bought a uv, and now wonder why it
took you so long, what kind of filter do you have? What's the media? how
big is the filter?

Matt

Critical Popperian wrote:
I have a 12,000G pond with two pumps going around 2500 GPH each in 2"
pipe into a large filter.

I installed 1 U.V. (36 Watt Tetra-UV3) about 5 days ago The U.V. is
rated to 4000 Flow and 8000 gallons.

I haven't noticed any significant difference in green water. I have
verified that it is working and seems to be an impressive unit.

Should I add another U.V. to the other pump as well?

How long does it take for algae to replicate? Is it possible the
algae is replicating faster than it can be zapped?

Or should I wait for two weeks to see how well it does?

Does the U.V. green water change happen "overnight" or will you see
little changes over time?

(Sorry for so many questions).

- Frustrated in U.V. land.

1 U.V. or 2?
 

For all of you that had pea soup, bought a uv, and now wonder why it
took you so long, what kind of filter do you have? What's the media? how
big is the filter?

I have a big Oase BioTec 30 rated up to 30,000 gallons (10k with
fish).

Great filter for ~1200 by the way. Does an immaculate job filtering
the water, even filters clay and will clean my fully muddy/murky
12,000G pond out in 24 hours and crystal clean within 72.

I like it most because it's the easiest to clean filter I have. I
didn't want bead because I've heard they won't filter everything as
good.

To clean the Biotec 30 you just open the drain to drain it a bit so no
more water is flowing out of the filter, but a bunch of water is still
in it. Pull the japanese wire mats out, rinse the bio-pads under the
incoming pond water, reinstall them, shake the wire mats inside the
filter in the open space / dirty water up and down, drain the entire
filter with the bottom drain and re-install.

Takes about 10 mins, maybe less. It's easier to clean then my
aquarium filter.

I don't know exactly how much I need to clean it yet. Once a week
(unless there is a reason) seems to be too much and 90 days too long,
I'm thinking probably once a month to clean it unless it's got a lot
of stuff to filter.