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Hi all

Ive just got a quick question regarding the various models on the market.

I have a pond that I want to get a steriliser for and looking at the pond sterilisers a 24W unit should do it fine (Up to 8000Ltrs) however some of the 24W units say up to 8000Ltrs and others say up to 400Ltrs...

Does anyone know why the large difference?

The 400ltr ones seem to be aimed at the fishtank market and the others for ponds but if they have the same power UV tube then whats the difference?

Any help would be great

Thanks

Hi,
Because the efficiency of the UV system keys on the
length of time the water is exposed to the UV light, I
would suggest the difference is in the length of the bulb
and the number of times the water travels around the
bulb as it passes through the enclosure.

In most cases, the inside of the enclosure looks like
a spiral fluorescent tube similar to those screw-in
fluorescent bulbs. In this case the water from the tank
flows through the spiraled Glass tube that encloses
the quartz glass UV bulb.

I suspect the one for the pond (8000l) is substantially
longer (larger) than the one for the 400l tank.

Frank


-->>> The Confidence of Amateurs, is the Envy of Professionals <<<--

Hi

Thanks for the reply.

They both seem to be approx the same length. The only real difference seems to be that the flow rate for the tank one is 430l/h and the pond ones are rated "Up to 5000l/h"

Maybe the only restriction on the tank ones is the inlet/outlet size and the built in power head?

Hi,
Could be. Without having the critter in my hands to look
at, I would not be sure. As I mentioned, THE KEY to UV
systems is the length of time the water is exposed to the
light. Now, they may figure that the number of times a
given quantity is exposed equates to the length of time.
Thus the difference in liters/hour.

Frank


-->>> The Confidence of Amateurs, is the Envy of Professionals <<<--

Hi

One thing that seems to be is that pond sterilisers are only made to remove algae and tank uniots are to kill parisites aswell. Algea takes no time to kill but the nasties need a longer exposure time. I shouild be able to run a faster pump on a tank unit to kill algae in a pond.