Importance of kh(carbonate hardness)

[Polly91]

What is the importance of carbonate hardness and what role does it play in an aquarium?
I have American cichlids and am just wondering what levels of kh I should be sustaining and why?

 

[Polly91]

Also what's the best way for maintaining a stable kh level?

 

[jcolon]

What is the importance of carbonate hardness and what role does it play in an aquarium?
I have American cichlids and am just wondering what levels of kh I should be sustaining and why?

I think the link below will answer all your questions.

Calcium, KH, GH, pH, Electrolytes & Magnesium in Aquariums; Mineral Ions, Cations

Hope it helps!