yep do it gradually checking the pH. right, dont shock the fish with sudden
pH changes. just a little at a time, 5 mg/l sounds right. Ingrid

"DavidM" wrote in message
...
Would you does the pond with Alum to the suggested 10-30 mg/l in a
single application, or over a few hours/days? If a pH test showed that
the level was down to below pH 6, would you treat with lime immediately
or wait to see if the hard water buffered the change over a few hours.

The PDF suggests 20 mg/l as a lime content to aim for, would dosing it
at 5 mg/l be gentle enough to avoid high pH spikes?

My pond is only about 3500 l, so I'm worried about shocking the fish and
making them ill.

Regards
DavidM


--
DavidM
www.djmorgan.org.uk