Actually Pszemol, you left out a lot of important
detail about how to properly do a scientific study.

You also need to do the following.

Make sure the fish are of the exact same age.
Make sure the fish are of the exact same size.
Make sure the fish are of the exact same mas.
Water of the same exact temp +- .00001 degree.
Tank size of the exact gallons
Tank size of the exact dimensions.
Rock, sand, gravel of the exact same mas.
Rock, sand, gravel of the exact same size
Position in the room of the exact same location.
Sound in the tanks to be the exact same.
Food measured out to the .00001 kilograms.
Lighting measured daily to make sure each tank is
getting exactly the same amount.
At least 10 tanks of the control.
At least 10 tanks of the test.
Run the test each year for 10 years.
Run the test at different barometric pressures.

But the reality is that what George presented is
sufficient to show what he has stated, and it agrees
with the results that many other people have seen.

Wayne Sallee
Wayne's Pets


Pszemol wrote on 3/5/2007 10:19 AM:
"George Patterson" wrote in message
news:_cFGh.558$3i.295@trnddc01...
Pszemol wrote:

Could you give me more details?

I started keeping marine fish in 1975. Those were the days of the
undergravel filter, and the use of powerheads was hailed as a great
advance by my friends

I am afraid we misunderstood each other.
I was hoping to hear about details of your scientific experiment and
you are giving me details on how you kept your fishtanks...
This is not what I was asking about.

To really tell how UV influences fish/ich you need to have controlled
group of fish without UV in the tank and expose both groups of fish
with the same amounts of parasite...

During the experiment you would need to actually measure water
flow through the UV lamp estimating UV exposure time for the
disease organisms have some detailed data on fish infections
with real dates and real numbers...

If you do not have all this than your statements are based on anegdotal
evidence or no evidence at all rather wishfull thinking instead.

And it really does not matter if you have tanks for 25 years or 2 months.
Scientific method is much more important in judging how UV affects ich.