Lee,

I beg to differ strongly.

UV sterilizers measure its light output in microwatts and the amount of
light needed
it measured in microwatts/sec/cm squared. Bacillus megatherium requires only
2,500 microwatts/sec/cm2, while most other bacteria are in the 5-10,000
range. Some require more than this and require 26,400 microwatts/sec/cm2
like Sarcina lutea. Many yeasts are in the 13,000-17,000 range and
then you have mold spores that in the 22,000-99,000 range with Aspergillus
niger requiring 330,000 microwatts/sec/cm2. The Tobacco mosaic virus
requires 440,000 and then protozoa require anywhere from 22,000 to 200,000
and
most Fungi need at least 45,000.

That being said, it should be noted that only about 2% of bacteria require
higher exposure to be killed by UV than algae.

Algae requires 22,000 micro-watt-seconds/square centimeter to be killed and
except for a few exceptions most bacteria is killed by less exposure. E.
coli for example requires only 6,600 micro-watt-second/squared centimeter.
So if the UV you have is working to kill the algae floating around in the
water it is certainly killing any bacteria that requires less than 22,000
micro-watts-seconds/squared cm.

Before the Soviet Unions fall that government was using UV to kill
Salmonella bacteria inside the egg through the shells via massive exposure
to UV.

Granted, gph of water flow, which fixes the time the organism is exposed to
the UV, decides the effectiveness of the killing capability of the device
you own as does turbidity of the water, but all in all UV is one of the most
effective devices found to kill bacteria. And if it is killing algae it is
killing bacteria, especially if it is left running after the algae has
cleared from the water.

Below, is listed the Minimum Lethal Dose (MLD) needed to kill the organisms
listed. I have tried to make the list narrow enough so it will fit into
most email programs.

ORGANISM . . . . . . . . . . MICRO-WATT/SEC/CM2
GROUP One - Bacteria
Bacillus anthracis...........................8,700
Bacillus megatherium sp (vetg) ...2,500
Bacillus megatherium (spores).....5,200
Bacillus paratyphosus....................6,100
Bacillus subtilis (mixed)...............11,000
Bacillus subtilis (spores)..............22,000
Clostridium tetami.........................22,000
Corynebacterium, Dephtheriae.....6,500
Dysentery bacilli..............................4,200
Esberthella typhosa........................4,100
Esherichia coli.................................6,600
Micrococcus candidus..................12,300
Micrococcus piltonensis...............15,000
Micrococcus sphaeroides............15,400
Mycobacterium tuberculosis.........10,000
Neisseria catarrhalis........................8,500
Phytomonas tumefaciens................8,500
Proteus vulgaris................................6,600
Pseudomonas aerugenosa...........10,500
Pseudomonas fluorescens...............6,600
Salmonella sp..................................10,000
Salmonella enteritidis........................7,600
Salmonella typhimurium (ave).........15,200
Sarcina lutea.....................................26,400
Serratia marcescens..........................6,160
Shigilla paradysenteriae....................3,400
Spirillum rubsum..................................6,160
Staphylococcus albus.........................5,700
Staphylococcus aureus.......................6,600
Staphylococcus lactis..........................8,800

GROUP Two - Yeasts
Saccharomyces ellipsoideus...........13,200
Saccharomyces sp............................17,600
Saccharomyces cerevisiae..............13,200
Brewers yeast......................................6,600
Bakers yeast........................................8,800
Common yeast cake.........................13,200

GROUP Three - Mold Spores
Penicillium roqueforti.........................26,400
Penicillium expansum........................22,000
Penicillium digitatum..........................88,000
Aspergillus glaucus............................88,000
Aspergillus flavus................................99,000
Aspergillus niger...............................330,000
Rhisopus nigricans...........................220,000
Mucor racemosus A............................35,200
Mucor racemosus B............................35,200
Oospora lactis.....................................11,000

GROUP IV - Virus
Bacteriophage (E. Coli)........................6,600
Tobacco Mosaic................................440,000
Influenza......................................... ..........6,800

GROUP V - Protozoa
Paramecium.......................................2 00,000
Nematode eggs....................................92,000
Chiorella vugaris (algae)......................22,000
Trichodina sp.........................................35,500
Trichodina niger..................................159,000
Saprolegnia sp..(zoospore).................35,000
Saprolegnia sp..(hypha).......................10,000
Sarcina lutea..........................................26, 400
Icthyophthirius sp. (tomite)..................336,000
Icthyophthirius sp. (tomite)..................100,000
Chilodonella cyprini...........................1,008,400

GROUP VI - Fungi
Fungi............................................. ...........45,000

HTH

Tom L.L.
--------------------------------------------
"Lee Brouillet" wrote in message
...
UV's will kill single cell algae, the ones responsible for "green water".
MOST UV's, and I make that statement with confidence - do NOT kill
bacteria.
The wattage necessary, and the dwell time of the water while exposed to
the
light, just isn't within the reach of most of us. Like a lot of equipment
aimed at ponders, the capabilities of a UV are very overstated. That being
said, the UV can *only* kill that which passes through it. The biobugs
growing in the biofilm growing in your filters is static: it doesn't move,
is not exposed to the UV, and is not subject to annihalation by it. Want
to
kill green algae? Get a UV. Want to kill string algae, bacteria, etc.?
Find
something else.

Lee


"FBCS" wrote in message
...
Man from Skippy filter (maybe Skippy, I don't know) say to get rid of my
UV
if I use his filter. Can someone expound on this?