How to raise hardness?

[Xandernfs]

My water is at about a 6...i heard baking soda raises it, but how much to use?

Thanks,
Xander

 

[drummereef]

First, what are you testing with? You should target your alkalinity between 7-11dkh. Baking soda will raise alkalinity. Then I would suggest getting on a supplimentation program for keeping your alk and calcium in balance.

Use this calculator
http://home.comcast.net/~jdieck1/chem_calc3.html

Read this
http://www.advancedaquarist.com/issues/feb2003/chem.htm

And this
http://www.reefkeeping.com/issues/2004-05/rhf/index.htm

 

[Xandernfs]

I dose with a 2 part CA & ALK solution from Kent....