limescale in the water, a problem?

[demon_surfer]

does anyone know of any reasons why limescale in the water would be bad for fish?

particularly goldfish

 

[Cearbhaill]

Goldfish do like water on the alkaline side- what is your GH?

 

[demon_surfer]

It is not my tank, I am asking on behalf of someone im trying to help in the newbie forum. Ill get his GH!