Is soft water better for keeping koi?

This is a topic we have looked at before and we are revisiting, as some koi enthusiasts advocate keeping their fish in very soft water. Should you do the same?

Is soft water better for keeping koi?
Continue reading “Is soft water better for keeping koi?”

Is soft water better for koi?

koi carpSome koi keepers have alleged that soft water is better when keeping koi. They believe that very soft water encourages enhanced growth and improved colour development. But they are wrong! Freshwater fish, including koi, should be kept in stable conditions and in water with a PH between 6 and 9. The degree of hardness should be no lower than DH6.

The degree of hardness is made up of two factors – KH and GH. KH is a measure of temporary or carbonate hardness and GH a measure of the total dissolved minerals in the water. GH is hard to change whereas KH can be altered relatively easily, both intentionally and accidently.
Continue reading “Is soft water better for koi?”