I think you are both missing 1 important point.
It doesn't sound like buff82...has a protein skimmer
which IS undoubtedly a heck of a lot more important than UV.

Not to mention the fact that canister filters are not meant for marine type
applications.

Chris




"carlrs" wrote in message
oups.com...
Pszemol wrote:
How can you prevent "these life forms" passing through your sterilizer?
How can UV sterilizer work in a selective way killing only disease
causing inverts/bacteria and not kill beneficial ones?
How can you justify UV sterilizer on a timer, and then expect it will
have any role in disease prevention ?
This is the first time over so many years in this hobby I hear from you
that people use metal halide lamps to sterilize water in their tanks,
to duplicate the ocean...

Are you 100% sure you know what are you talking about?

[1]The timer is used to allow certain feeding times
[2]On a new aquaria I recommend continuous operation, especially when
new fauna are added
[3]Yes metal halide only emit A & B uv, and I am not advocating their
use as a sterilizerer, only that UV B DOES have damaging properties to
organic substances.
[4] I have been maintaining sucessfull reef aquariums for 27 years,
with and without UVs, with fauna reproducing.
[5] In the maintenance business, most of my customers overfeed, do not
purchase fauna carefully (I generally provided them with their sealife,
but many couldn't resist other purchases), and in general ran a higher
risk of disease introduction, as they are not experts, like I assume
you are. By running th UV continuously and then later in cycles
corresponding to feeding schedules, I helped minimize disease
introduction
[6] UVs are not a cure all, and in fact do very little to kill multi
cell organisms, and even larger protozoa.
[7] The final half of your statement, although true, was never stated
by me.

Carl