Premium Quality
Individual Koi

In a wide range of varieties, sizes and prices

small koi mixes

Wide range of varieties and sizes

High Quality Koi

Throughout the year


As the UK's breeder of champions

koi fry

During the summer

Byer Koi Farm is a UK Koi Farm based in Hertfordshire

We sell Koi Carp, Koi Fry, Small Koi, Tosai and Nisai. Buy your koi online with delivery to most areas of mainland UK using our specialist fish courier service.

Or we are open all year round to visit by appointment.

Breeding nishikigoi the Japanese way from Japanese Koi, but in the UK.

We are near Hemel Hempstead, in South East England not far from London, Essex, Buckinghamshire, Berkshire, Oxfordshire and Northamptonshire.

A family business

everyone contributes

A focus on quality

very special Japanese koi brood stock and optimised breeding lines

Focusing on quality
award winning koi
8 recent koi champions, and 100's of koi awards
awards list

variety specialists

Kohaku, Oakly Chagoi, Showa

jumbo single colour koi

Mukashi Ogon, Chagoi, Karashigoi, Yamabuki

jumbo koi genetics

jumbo tosai

Our retail store

Open any day, via appointment.

Contact Us to book in.

Get directions