Skip to content
FREE SHIPPING OVER $99* + EARN 2.5% BACK IN FIN POINTS!

Need help?

(206) 350-7580
[email protected]

Follow Us

  • Facebook
  • Twitter
  • Instagram
  • Pinterest
  • YouTube
  • TikTok
  • LinkedIn
  • Pond Supplies
  • Koi Food & Care
  • Koi Fish
  • All Koi Fish
  • Butterfly Koi
  • Japanese Koi
  • Premium & Show Koi
  • Kodama Koi Farm
  • Dainichi Koi Farm
  • Pond Plants
  • All Pond Plants
  • Hardy Water Lilies
  • Tropical Water Lilies
  • 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
  • Pond Filtration
  • All Pond Filtration
  • Pressurized & Bead Filters
  • Rotary Drum Filters
  • Bakki Shower Filters
  • Filter Media & Pads
  • All-in-One Filtration
  • Mechanical & Pre-Filtration
  • Rotary Drum Filters (RDF)
  • Pond Sieves & Sieve Pre-Filters
  • Pump Pre-Filters & Strainers
  • Settlement & Vortex Chambers
  • Pond Skimmers
  • All Pond Skimmers
  • In-Wall Skimmers
  • Floating Skimmers
  • Skimmer Accessories
  • UV Clarifiers
  • All UV Clarifiers
  • UV Replacement Bulbs
  • Pond Pumps
  • All Pond Pumps
  • External Pumps
  • Submersible Pumps
  • Waterfall Pumps
  • Air Pumps
  • Pump Accessories
  • Aeration
  • All Aeration
  • Aeration Kits
  • Diffusers
  • Water Features
  • Fountains
  • Pondless Waterfalls
  • Spillways
  • Pond Kits
  • Pond Liners
  • All Pond Liners
  • EPDM Liners
  • RPE Liners
  • Box-Welded Liners
  • Underlayment
  • Liner Repair
  • Plumbing & Construction
  • Plumbing & Fittings
  • PVC Hose & Pipe
  • Tubing & Hose
  • Fittings & Valves
  • Bottom Drains
  • Foam & Sealant
  • Pond Portals
  • Lighting & Décor
  • All Pond Lighting
  • LED Lights
  • Color-Changing Lights
  • Underwater Lights
  • Decorative
  • Koi Viewing Windows
  • Nets & Fish Protection
  • Koi Nets
  • 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
  • Koi Food
  • All Koi Food
  • 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
  • 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
  • Plan Your Pond
  • Pond Planning Portal
  • Getting Started With Koi Ponds
  • Building Your Koi Pond
  • Customer Corner — Pond Builds
  • Calculators & Tools
  • Buying Guides
  • Pond Aeration & Air Pumps
  • Pond Pumps
  • Pressure Filters & Bead Filters
  • Rotary Drum Filters (RDF)
  • Bottom Drains
  • UV Sterilizers & Clarifiers
  • Pond Care Library
  • Koi & Fish Care
  • Water Quality & Maintenance
  • Plants & Aquascaping
  • Seasonal Management
  • Troubleshooting & FAQs
Play It Koi PLAYITKOI

Useful Links

  • About us
  • Reviews
  • Store Location
  • Gift Cards
  • FAQs
  • Rewards
  • Careers
  • Community
  • More Ways to Connect
Login
0
Cart

Your cart is empty

Shop our products
  • Pond Supplies
    • Pond Filtration
      • All Pond Filtration
      • Pressurized & Bead Filters
      • Rotary Drum Filters
      • Bakki Shower Filters
      • Filter Media & Pads
      • All-in-One Filtration
    • Mechanical & Pre-Filtration
      • Rotary Drum Filters (RDF)
      • Pond Sieves & Sieve Pre-Filters
      • Pump Pre-Filters & Strainers
      • Settlement & Vortex Chambers
    • Pond Skimmers
      • All Pond Skimmers
      • In-Wall Skimmers
      • Floating Skimmers
      • Skimmer Accessories
    • UV Clarifiers
      • All UV Clarifiers
      • UV Replacement Bulbs
    • Pond Pumps
      • All Pond Pumps
      • External Pumps
      • Submersible Pumps
      • Waterfall Pumps
      • Air Pumps
      • Pump Accessories
    • Aeration
      • All Aeration
      • Aeration Kits
      • Diffusers
    • Water Features
      • Fountains
      • Pondless Waterfalls
      • Spillways
      • Pond Kits
    • Pond Liners
      • All Pond Liners
      • EPDM Liners
      • RPE Liners
      • Box-Welded Liners
      • Underlayment
      • Liner Repair
    • Plumbing & Construction
      • Plumbing & Fittings
      • PVC Hose & Pipe
      • Tubing & Hose
      • Fittings & Valves
      • Bottom Drains
      • Foam & Sealant
      • Pond Portals
    • Lighting & Décor
      • All Pond Lighting
      • LED Lights
      • Color-Changing Lights
      • Underwater Lights
      • Decorative
      • Koi Viewing Windows
    • Nets & Fish Protection
      • Koi Nets
      • 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
  • Koi Food & Care
    • Koi Food
      • All Koi Food
      • 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
    • All Koi Fish
    • Butterfly Koi
    • Japanese Koi
    • Premium & Show Koi
    • Kodama Koi Farm
    • Dainichi Koi Farm
  • Pond Plants
    • All Pond Plants
    • 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
    • Buying Guides
      • Pond Aeration & Air Pumps
      • Pond Pumps
      • Pressure Filters & Bead Filters
      • Rotary Drum Filters (RDF)
      • Bottom Drains
      • UV Sterilizers & Clarifiers
    • Pond Care Library
      • Koi & Fish Care
      • Water Quality & Maintenance
      • Plants & Aquascaping
      • Seasonal Management
      • Troubleshooting & FAQs

Pond Filtration Basics

How Many Bottom Drains Do You Need? Sizing Guide for Koi Ponds

bottom drainBen CookeApr 05, 2026

Free delivery over $99

Within continental US. Excludes liner and some freight goods

Top-notch support

We know ponds, water features & fish. We will make you successful!

No hassle refunds

Buy with confidence with our generous return policy

Secure

PCI DSS Compliant. Full Encrypted payment processing

  • About us
  • Reviews
  • Store Location
  • Gift Cards
  • FAQs
  • Rewards
  • Careers
  • Community
  • More Ways to Connect
  • Our EcoPromise: Carbon Neutral
  • Price Match Guarantee
  • Return & Refund Policy
  • Shipping Policy
  • Terms of Service
  • Privacy Policy
  • Subscription Policy
  • Contact Us
  • Help Center
  • [email protected]
  • Call, Text, or WhatsApp: (206) 350-7580
  • Mon-Friday 9-6 EST
  • Curbside pickup & Sunday in-person visits by appt only

Newsletter

Join the Club and receive Newsletters with expert tips and early notices on sales

Language
Language

© 2026 Play It Koi

Follow Us

We Accept

American Express Apple Pay Diners Club Discover Google Pay Mastercard PayPal Shop Pay USDC Visa

© 2026 Play It Koi

  • Opens in a new window.