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      • Winter & Wheat Germ
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      • Koi Treats
      • Automatic Feeders
    • Fish Health
      • Koi Medications
      • Koi Parasite Treatments
      • Pond Salt
      • Quarantine Supplies
      • Koi Show Tanks
    • Water Treatments
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      • Beneficial Bacteria
      • Algae Control
      • Water Conditioners
      • Ammonia Removers & Binders
      • Sludge & Muck Removers
      • Pond Clarifiers
    • Natural & Testing
      • Pond Test Kits
      • Barley Straw
      • Pond Dye
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    • Japanese Koi
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    • Kodama Koi Farm
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      • All Hardy Water Lilies
      • Red Hardy Lilies
      • Pink Hardy Lilies
      • White Hardy Lilies
      • Yellow Hardy Lilies
      • Peach & Orange Hardy Lilies
      • Dwarf & Small Water Lilies
    • Tropical Water Lilies
      • All Tropical Water Lilies
      • Day Blooming Tropical Lilies
      • Night Blooming Tropical Lilies
      • Blue & Purple Tropical Lilies
    • Lotus
      • All Lotus
      • Bowl & Miniature Lotus
      • Dwarf & Small Lotus
      • Medium Lotus
      • Large Pond Lotus
      • Red Lotus
      • Pink Lotus
      • White Lotus
      • Yellow Lotus
      • Multi-Color Lotus
      • Multi-Petal & Double Lotus
    • Floating Plants
    • Marginal / Shallow Water Plants
      • All Marginal Plants
      • Bog & Moist Soil Plants
      • Shallow Water Plants (0 to 6 in)
      • Tall Pond Plants
      • Plants for Shade
    • Oxygenating Plants
    • Canna Lilies
    • Water Iris
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      • Louisiana Iris
      • Japanese Iris
      • Pseudata Iris
    • Taro Plants
    • Plant Supplies
  • Learning Center
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      • Building Your Koi Pond
      • Bottom Drain Planning
      • Customer Corner — Pond Builds
      • Calculators & Tools
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      • Gravity-Fed Drum Filter Simulator
      • Pump-Fed Drum Filter Simulator
      • Bottom Drains
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Pond Filtration Basics

The 2-Inch Pipe Flow Rate Myth: Why “5,000 GPH Max” Is Wrong

flow rateBen CookeAug 11, 2026

The 2-Inch Pipe Flow Rate Myth: Why “5,000 GPH Max” Is Wrong

flow rateBen CookeAug 11, 2026

How Much Does It Cost to Run a Pond Pump? Energy Guide & Calculator

cost to run pond pumpPlay It KoiApr 07, 2026

Best Koi Pond Pumps [2026]: Reviewed and Compared by Type

best external pond pumpPlay It KoiApr 07, 2026

External vs Submersible Pond Pumps: Which Is Right for Your Koi Pond?

external pond pumpPlay It KoiApr 07, 2026

Total Dynamic Head (TDH) Explained: Why Your Pond Pump Isn't Delivering the GPH on the Box

friction lossPlay It KoiApr 07, 2026

UV Sterilizer Placement in Your Koi Pond Filtration System

Filtration SystemBen CookeApr 06, 2026

What Size UV Sterilizer Do I Need? Sizing Guide for Koi Ponds

Pond UVBen CookeApr 06, 2026

UV Sterilizer vs UV Clarifier: What's the Difference?

EducationBen CookeApr 06, 2026

Best UV Sterilizers for Koi Ponds [Reviewed & Compared]

Pond UVBen CookeApr 06, 2026

Koi Pond Bottom Drain FAQ: 28 Questions Answered

bottom drainBen CookeApr 05, 2026

Bottom Drain Pipe Sizing, Fittings & Plumbing Best Practices

bottom drainBen CookeApr 05, 2026

Adding a Bottom Drain to an Existing Koi Pond: Is It Worth It?

bottom drainBen CookeApr 05, 2026

What Is a Settlement Chamber? How It Works and How to Size One

bottom drainBen CookeApr 05, 2026
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