"Dave S" wrote in message
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"Iain Miller" wrote in message
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"Dave S" wrote in message
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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.

Nothing to do with Kh....

Your Phosphate readings were high at the vbeginning of the month - you've
done something in the intervening period to reduce them. High phosphates are
a known cause of Algae. To get rid of Algae you need to get your plants
growing better - this will starve the algae out. To do that you need
nutrients, CO2 & good light. On the latter, when was the last time you
changed the bulbs? If they are over a year old then you need to replace
them. Start with those & add more plants. Suggest you test your iron levels
as well.

I.