Green Water in Koi Pond: Remove Plants, Upgrade Filtration

Koi and Plants Don't Mix

Koi uproot and shred potted plants, creating constant turbidity. For clear water, either remove plants or protect them in cages inaccessible to koi.

Bottom drain → settlement chamber → brush filter → biofilter (bakki shower or moving bed) → UV → return.
DIY filter plans: fishpondinfo.com (see filter page).
Water changes (10% weekly) essential.

New ponds take 6–12 months to clear. Patience + proper filtration = clear water.

Pond and Water Gardening: Winterizing a Koi Pond in North Carolina; Milky White Water in New Pond: Causes and Cures; Persistent Green Algae in Large Koi Pond: Filter Maturity and Maintenance; Fixing Cloudy Pond Water and Black-Coated Waterfall Rocks; Kidney Pond (3×1 ft) Green Algae Constantly; Brown Water in a Natural Half-Acre Pond: Iron, Tannins, or Clay?; Chronic Cloudy Water in a Sun-Exposed Pond: Fine Particles from Roots and Fish; Cesspool-Smelling Large Pond: No Outlet = Stagnation Death; Clearing Murky Pond Water After a Hot Spell; String Algae & Clarity in 2,500-Gal Pond: Filter Maintenance

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