Can you protect your koi pond from herons?

heronThere is nothing more soul-destroying than an heron visiting your koi pond. Your fish will start disappearing rapidly as these skilful and determined thieves work out how to bypass your protection measures to access one meal after another. You will soon understand that the term bird brain is a misnomer. Herons are clever – very clever!
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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.
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