Marcus

Where do you get Calcium Carbonate and what type of volume are you
talking about??

WF


On Thu, 10 Apr 2003 20:31:48 +0100, "Marcus Tait"
wrote:

To increase just the KH you can add sodium bicarbonate (baking soda). To
increase KH and GH in equal amounts you can add calcium carbonate. calcium
carbonate is probably best because your plants will need calcium which you
will be short of in sof****er. Also you can add magnesium sulphate (epson
salts) which will increase just the GH.

For my planted tank a aim for a KH of about 5dH and a GH of about 6dH. the
calcium carbonate i add takes both GH and KH to 5dH and the magnesium
sulphate i add then takes GH to 6dH. With CO2 injection at about 25ppm it
gives me an pH of about 6.8

Be careful when adding anything which changes your KH as it will change your
pH as well. Add it slowly.