Koi Pond Care: Feeding, Water Quality, Winter, and Health

Building a koi pond is one job; keeping it healthy is another. These guides cover the four things that decide whether a koi pond thrives: what and when to feed, which water readings to watch, how to handle a mild coastal winter, and how to read the fish themselves.

Koi Pond Care

Feeding Koi by Season on the Central Coast

Water temperature, not the calendar, decides what and how often koi should be fed. Here is the schedule that works in a coastal climate with mild winters.

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Koi Pond Care

Koi Pond Water Quality: The Five Numbers That Matter

Clear water is not the same as healthy water. These five test readings tell you what is actually happening in a koi pond before the fish show it.

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Koi Pond Care

Winter Care for Koi Ponds on the Central Coast

Mild coastal winters make overwintering koi straightforward — as long as you stop feeding at the right temperature and keep the water moving.

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Koi Pond Care

Koi Health: The Warning Signs Worth Acting On

Flashing, gasping, clamped fins, sudden hiding — what each behavior usually means, and why water testing comes before any treatment.

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Local conditions

What works in a foggy beach garden is not what works over the hill. These pages cover water features town by town.