The uv exposure needed to kill algae, requires a longer time of exposure, so
slower is better. If you want to go faster,m then you need a larger uv
light.
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RichToyBox
http://www.geocities.com/richtoybox/pondintro.html
"HA HA Budys Here" wrote in message
...
Is it better that the water flow through a UV alge light fast, or slow?