 |
Koi pond question, U.V. lamp
replacement 04/05/09
HI all
I have a 850 gallon pond i purchased a U.V. light two years ago, i have
about (45) fish. my question is should i go threw my biological filter
first and then the u.v. light. The reason i am asking this after two
years is that
the water does not get is clear as i would like. Any idea why.
Thanks Ron Stanton
<Mmm, these lamps are likely shot... need to be replaced about every
year if in continuous operation... Doesn't matter if they still "light
up"...
they're not producing the wavelength of ionizing radiation you're
seeking... I should also make a mention of being careful re the removal
and the need to clean the sleeves, and... Bob Fenner>
Pond uv filter
3/23/09
I have a 150 gallon pond. I am looking for a new uv filter for it
(canister type). The one I have is complete crap. And I see there are
millions of different brands. Do you have any preferred brands for a
pond this size? Please help.
Thank you very much.
Penny
<Ah, yes... I do... TMC's Vecton line is superlative... Are you in the
U.S.? Have your dealer contact their distributor, Quality Marine in Los
Angeles if so. Bob Fenner>
Green water, pond... UV use 6/17/08
Hello again, I have another concern. The water on our pond is greenish in
color, we tested the water and everything seem to be fine. It is a fairly new
pond, and we have been running it for about 2 weeks now. Do you think we'll be
able to see the bottom even if it is 4 feet deep? Our filter is an Ultima model
(bead filter) which I am sure is sufficient for my set up. I am wondering if
maybe it is the UV that needs to be replaced/addressed?
<Green water is often a good sign that the UV tube in a UV steriliser needs
replacing. Do bear in mind the tubes in these devices lasts around 12 months
depending on the model (check the instruction manual that came with yours for
the precise details). UV tubes aren't expensive, and changing them is usually a
10 minute job, if that. Cheers, Neale.>
UV filtration needed (for large natural pond)? 7/16/05
Hi there. We just dug a pond, approx. 35 X 60 feet, 8 feet deep max, with
one corner to be a wetland. We are beginning to plant it with local vegetation
today. The pond is not lined, but has had rubble (3 to 4 inch diameter) added
inside to stabilize the banks.
<... and percolation? Oh, see you've addressed this below>
There is a small sandy beach. Dug the test hole last year and it holds
water. The pond is actually dug along the path of a natural drainage channel,
at the base of a 20 ft rock wall. (pics to follow) Anyway, we have raised the
natural water level about 2 feet. Approx 50% Clay soils, so retention will be
OK. However, the source of the added water is a stream. I know coliform and
other critters are naturally occurring in any surface water system.
<Yes>
The stream is thick with aquatic vegetation, a sure sign of nutrients I would
imagine. We are drawing water from further upstream to get the cleanest water
possible. But once it hits the pond, it's wide open, sunny, and I would
imagine bacterial growth will take off.
A few questions:
1) Should we use UV filtering. Won't this kill all bacteria including
beneficials?
<Mmm, I would not use ultraviolet here... but would definitely look into
ozonation directly>
2) How much area should be wetland or vegetation?
<At least ten percent>
3) How do I stabilize the sandy beach which right now is like quicksand?
<Mmm, depends on composition... would have a soils engineer, firm... depending
on the make-up, you may be able to just add a bit of silicate, carbonaceous
material to make this area more "solid"... at the very worst, a berm might need
to be emplaced and the area back-filled with a suitable substrate>
We will be running two waterfalls, one a height of 20 ft.
<Wowzah! Do be careful re pump selection, operational cost here>
and the other just a 2 foot rise over 6 inch slabs (kind of like steps) with
gravel and sand. Pump rated for 5000 gph, but will probably get about 3000
after friction loss/head. We were also thinking about making a type of sand
filter out of a couple of apple juice barrels!
<... likely not worth doing... will clog very quickly... and w/o a very easy
backwashing mechanism will be ignored, abandoned in short order>
I have to say I am excited about discovering this site. So far, my biggest
problem seems to be the lack of consistent info. Example, the pump
manufacturers said I need 10 pumps running in tandem!!!
<Heeee! Geez!>
(I think not) It's hard to know what to do. Any help would be appreciated.
Noreen
<Glad to share. Please make it known if this/these communication/s aren't clear.
Bob Fenner>
|
|
