BoyPete wrote:

This is my first year with a pond. Contrary to advice I read, because it has
been a mild winter, I've kept pump/filters/UV running all the time. The
pop-up on the filter is half way up, so it must have been doing some good. I
have a newlamp ready to put in .......prob at easter.

What brand do you have? and is it a combined unit?

TIA
Gill