Starting a Koi Pond in a Fountain Basin

An 8 ft wide, 10" deep fountain basin is not suitable for koi.

• Koi need 5+ ft depth and 2,600+ gallons.
• 1 koi per 1,000–2,000 L.
• Fountains only aerate slightly—no filtration.

Design properly first: sketch, plan filter (mechanical + biological + plant), ensure depth and volume. A fountain is a decoration, not a koi home.