"Iain Miller" wrote in message
...

"Dave S" wrote in message
...
How do I reduce a KH of 150mg/L to 80-100mg/L?

Use water filtered through peat or use RO water for your water
changes.Alternatively stuff some bogwood in the tank or peat granules in
your filter.

Thanks for that!

Before you do this, why do you want to do it? Unless you have specific
fish that require it (and most don't) I should leave well alone (!)

I have a lot of algae on plant leaves, and as all the other water paremters
are OK, I'm trying to identify the reason.

Dave