In article ,
SkyCatcher wrote:

The UV is 18w heissner unit

I cleaned the quartz sleeve when I changed the bulb. It was coated in
limescale (& I mean coated)

I know what you mean, I soak them in the product 'Lime-Away'.

I think if you have moderate sun exposure, you will need closer to
30-40 watts for that many liters.

jay
Tue Jul 13, 2004





"Go Fig" wrote in message
...
In article ,
SkyCatcher wrote:

Hi,

I have a 12000L pond with plants & NO fish. The filter/pump/UV are
appropriately sized & I changed the UV bulb 2 week ago - AND the pond if
still filled with green gloopy algae.

What unit is this, how many watts ? Sounds like the quartz sleeve
needs cleaning.

jay
Tue Jul 13, 2004




What more can I do to sort this out?

Help!