In article , Michael Stokes
wrote:

Re-ordered.

Just calculate on a 1x1cm column. Keep the wind down or you'll blow it
over...

1x1 = 1

Close.

So at 3m depth an addition of 3mm rainwater 6deg colder is a mixture 1000:1
reducing the overall water temperature by (roughly) a half of one percent of a
degree. Now is that temperature drop going to put the fish off?

Cheerio,

--