Ornamental Fish Q&A 06


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One of your koi-owning clients contacts you early one morning and she is very distressed. All nine of her prized koi are dead and floating in the pond. They were apparently normal last night and had good appetites for their evening feeding.

The 2,500-L pond is supplied with city water and has adequate biological and mechanical filtration as well as an aerating fountain. All components are functioning normally but the owner mentions that the person who ‘topped off’ the pond last night with water had inadvertently left the hose running all night (the hose can be seen in the photograph).


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