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      • LED Lights
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      • Koi Viewing Windows
    • Nets & Fish Protection
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      • Pond Netting
      • Predator Control
      • Fish Shelters & Caves
    • Cleaning & Maintenance
      • Care & Maintenance
      • Pond Vacuums
      • Seasonal Supplies
    • Winterization
      • Fall & Winter Prep
      • Pond Heaters & De-Icers
      • Floating Heaters
      • Submersible Heaters
      • Cold Water Bacteria
      • Spring Startup
    • Replacement Parts
      • All Replacement Parts
      • UV Replacement Bulbs
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      • Staple Food
      • Color-Enhancing Food
      • Growth Food
      • Winter & Wheat Germ
      • Spring & Fall Diet
      • Floating Koi Food
      • Sinking Koi Food
      • Koi Treats
      • Automatic Feeders
    • Fish Health
      • Koi Medications
      • Koi Parasite Treatments
      • Pond Salt
      • Quarantine Supplies
      • Koi Show Tanks
    • Water Treatments
      • All Water Treatments
      • Beneficial Bacteria
      • Algae Control
      • Water Conditioners
      • Sludge & Muck Removers
      • Pond Clarifiers
    • Natural & Testing
      • Pond Test Kits
      • Barley Straw
      • Pond Dye
  • Koi Fish
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    • Butterfly Koi
    • Japanese Koi
    • Premium & Show Koi
    • Kodama Koi Farm
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    • Hardy Water Lilies
    • Tropical Water Lilies
    • Lotus
      • All Lotus
      • Bowl & Miniature Lotus
      • Medium Lotus
      • Large Pond Lotus
      • Red Lotus
      • Pink Lotus
      • White Lotus
      • Yellow Lotus
      • Multi-Color Lotus
      • Multi-Petal & Double Lotus
      • Lotus Seeds
    • Floating Plants
    • Marginal / Shallow Water Plants
    • Oxygenating Plants
    • Canna Lilies
    • Water Iris
    • Taro Plants
    • Plant Supplies
  • Shop by Brand
    • Anjon
    • API Pond Care
    • Aqua Meds
    • Aqua Ultraviolet
    • AquaDyne
    • Aquascape
    • Atlantic Water Gardens
    • Blue Thumb
    • Carlisle
    • DreamPond
    • EasyPro
    • Evolution Aqua
    • Firestone PondGard
    • GC Tek
    • Helix Life Support
    • Hikari
    • Kodama Koi Farm
    • Koi Care Kennel
    • Koi Pharma
    • Laguna
    • Matala
    • MDM Pumps - Sequence & ValuFlo
    • Microbe-Lift
    • Mountain Tree
    • Nijikawa
    • KoiGuard
    • Nualgi Ponds
    • OASE
    • PerformancePro
    • PondMAX
    • Savio
    • Teton
    • Ultra Balance
    • SuperNatural
  • Learning Center
    • Plan Your Pond
      • Pond Planning Portal
      • Getting Started With Koi Ponds
      • Building Your Koi Pond
      • Customer Corner — Pond Builds
      • Calculators & Tools
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      • Pond Pumps
      • Pressure Filters & Bead Filters
      • Rotary Drum Filters (RDF)
      • Bottom Drains
      • UV Sterilizers & Clarifiers
    • Pond Care Library
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      • Troubleshooting & FAQs

Pond Filtration Basics

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

friction lossShopify APIApr 07, 2026

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