*Note: There are TWO "Koi-Lo's" on this NG*

"DavidM" wrote in message
...
Koi-Lo wrote, On 30/04/2006 16:39:
I've read in several places to turn your UV light off for (so many hours)
after adding any type of bacterial product. It's so easy to do - why
not?

Yeah, better to be safe than sorry. There's no point cooking bacteria that
you've just added to the pond.

Exactly. That's why I pull the plug when I add KoiZyme if I'm using the UV
units we have. This year the algae is bad in the 2000g pond, so I plan to
hook it up this week.

You're probably right but not everyone has water going through their UV
filter at a high rate of speed. I don't know if that would matter or not.
I know ours runs through the UV unit at around 250gph in the smaller 800g
pond and you can see a difference in 24 hours. In less than a week it's
clear of visible algae.

I was jumping around between different ideas. I don't doubt that UV lights
help remove algae. The water speed is probably not an issue in that
respect because it's just altering some sugars (I think) in the cell wall
that cause adhesion. That has nothing to do with killing bacteria as
claimed by the UV sterilisers though. I was questioning whether they are
able to effectively kill all bugs in flowing liquid.

Not all bugs. I believe they do kill some bacteria but not the larger
parasites free in the water. Since killing bacteria wasn't why we bought
them, I never researched it but took the advice I saw - and shut them off
when adding "good" bacteria. I leave them off at least overnight.

On the subject of killing _all_ bugs, do people use hydrogen peroxide
producing powders for killing bacteria and parasites. They are supposed to
replicate the pumped H2O2 solutions used in fish farms. I spoke to a guy
trying to sell some at a UK Koi show, I need more convincing though.

David

That I couldn't tell you as I use Potassium Permanganate or Formilin if
necessary. I use Dimilin for anchor worm but haven't seen that problem in
years.
--
Koi-Lo....
Frugal ponding since 1995.
Aquariums since 1952.
My Pond & Aquarium Pages:
http://tinyurl.com/9do58
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