Hardness

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Hardness ppm
Soft: 0 to 75 ppm
Moderately hard: 75 to 150 ppm
Hard: 150 to 300 ppm
Very Hard: 300+ ppm

Moderately hard water is generally recommended for Koi fish.

Hardness is a measure of mineral ions in the water the preponderance of which is Calcium and Magnesium. General hardness GH is usually expressed in terms of the amount of calcium carbonate (CaCO3) present in solution. It is measured in degrees of German hardness (oDH) which can be converted to ppm by multiplying by 17.9.

 

Koi fish, Nishikigoi, Japanese Koi, Show Koi, Koi ponds, Butterfly Koi, Koi diseases, Koi identification pictures and everything on "HOW TO" information!

Koi Koi Sale Prices Koi Order Form Other Websites Koi Book Store We Buy Koi Koi Varieties Koi Growth Koi Weight Koi Age Koi History Koi Taxonomy Koi Sexing Koi Can Hear Koi Can Taste Koi Can Smell Koi Can Blush Koi Can Overeat Koi Nitrification Koi Filtration Pump Savings Pump head Koi Need Oxygen Koi Shows Koi Quality Koi Feeding Why Koi? Koi Imports Koi Pond Liners Koi Pond Tours Koi Pond Plants Koi Predators Koi Equipment Koi Services Koi Store Pictures Koi Water Quality Koi Water Testing Koi Health Koi Pond Heating Keywork Search Koi Index

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