---
product_id: 88280580
title: "HALF OFF PONDS PondBuilder Crystal 4000 GPH Submersible Pump Pond Kit 20' x 20' EPDM Rubber Pond Liner, Waterfall Filter, Skimmer, Lighting & Plumbing Koi Pond Kit, Backyard Water Garden"
brand: "half off ponds"
price: "¥424281"
currency: JPY
in_stock: true
reviews_count: 8
url: https://www.desertcart.jp/products/88280580-half-off-ponds-pondbuilder-crystal-4000-gph-submersible-pump-pond
store_origin: JP
region: Japan
---

# Energy-efficient LED lighting 4000 GPH pump power Lifetime durable EPDM liner HALF OFF PONDS PondBuilder Crystal 4000 GPH Submersible Pump Pond Kit 20' x 20' EPDM Rubber Pond Liner, Waterfall Filter, Skimmer, Lighting & Plumbing Koi Pond Kit, Backyard Water Garden

**Brand:** half off ponds
**Price:** ¥424281
**Availability:** ✅ In Stock

## Summary

> 💦 Transform your backyard into a serene water haven—because your pond deserves the best!

## Quick Answers

- **What is this?** HALF OFF PONDS PondBuilder Crystal 4000 GPH Submersible Pump Pond Kit 20' x 20' EPDM Rubber Pond Liner, Waterfall Filter, Skimmer, Lighting & Plumbing Koi Pond Kit, Backyard Water Garden by half off ponds
- **How much does it cost?** ¥424281 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/88280580-half-off-ponds-pondbuilder-crystal-4000-gph-submersible-pump-pond)

## Best For

- half off ponds enthusiasts

## Why This Product

- Trusted half off ponds brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Endure:** Lifetime warranty on the 45-mil EPDM LifeGuard liner protects your pond from punctures and wear.
- • **Complete Ecosystem Kit:** Includes waterfall, skimmer with leaf basket, lighting, and all plumbing for effortless setup.
- • **Powerful Aqua Pulse Pump:** 4,000 GPH variable speed motor ensures crystal-clear water flow and energy savings.
- • **Customizable Water Garden:** Design your perfect 16' x 16' pond or tailor dimensions to fit your backyard oasis.
- • **Eco-Friendly Illumination:** 1-Watt mini bronze LED spotlight enhances ambiance while minimizing energy use.

## Overview

The PondBuilder Crystal 4000 Kit offers a comprehensive, durable solution for creating a 2,800-gallon water garden or koi pond. Featuring a powerful 4,000 GPH energy-efficient pump, a lifetime-guaranteed EPDM liner, and integrated waterfall, skimmer, and LED lighting, this kit delivers everything needed for a professional-grade backyard water feature with easy installation and long-lasting performance.

## Description

HALF OFF PONDS PondBuilder Crystal 4000 GPH Submersible Pump Pond Kit 20' x 20' EPDM Rubber Pond Liner, Waterfall Filter, Skimmer, Lighting & Plumbing Koi Pond Kit, Backyard Water Garden

## Features

- Build Your Dream Pond - 20' x 20' Pond Kit can build a 16' x 16' 2,800-gallon water garden or fish pond at a 1.5' depth. Finished pond length, width, and depth can be tailored to your specific requirements.
- Everything You Need - PondBuilder Crystal 4000 Water Garden Kit Includes: PondBuilder Crystal 20" Waterfall, PondBuilder Crystal 7" Pond Skimmer, Aqua Pulse 4,000 GPH Pump, 20 ft. x 20 ft. of 45-mil EPDM LifeGuard Pond Liner, 400 sqft. of UnderGuard Geotextile Underlayment, 1-Watt Mini Bronze Spot Light, 1.5" x 25' Kink Free Tubing, Waterfall Foam to seal gaps between rocks - 16oz. can
- Built to Last - LifeGuard Pond Liner is durable. Underlayment adds protection from rocks and punctures underneath the pond liner. Aqua Pulse pump has a highly energy efficient variable speed motor. Skimmer has leaf basket for cleaning floating debris. Waterfall has aeration tubing for added oxygenination. Pond lighting has energy efficient LED technology. Waterfall foam is used to seal gaps in rocks in the stream and waterfall.
- A Kit You Can Trust - Warranties: EPDM LifeGuard Pond Liner - Limited Lifetime; Waterfall Filter and Skimmer - 5 years; 4,000 GPH Pump - 2 years; Lighting - 2 years
- All installation hardware and plumbing fixtures are included. May ship in more than one box.

## Images

![HALF OFF PONDS PondBuilder Crystal 4000 GPH Submersible Pump Pond Kit 20' x 20' EPDM Rubber Pond Liner, Waterfall Filter, Skimmer, Lighting & Plumbing Koi Pond Kit, Backyard Water Garden - Image 1](https://m.media-amazon.com/images/I/61pI3-UFrBL.jpg)
![HALF OFF PONDS PondBuilder Crystal 4000 GPH Submersible Pump Pond Kit 20' x 20' EPDM Rubber Pond Liner, Waterfall Filter, Skimmer, Lighting & Plumbing Koi Pond Kit, Backyard Water Garden - Image 2](https://m.media-amazon.com/images/I/61x18+SlfAL.jpg)
![HALF OFF PONDS PondBuilder Crystal 4000 GPH Submersible Pump Pond Kit 20' x 20' EPDM Rubber Pond Liner, Waterfall Filter, Skimmer, Lighting & Plumbing Koi Pond Kit, Backyard Water Garden - Image 3](https://m.media-amazon.com/images/I/61EA5drtWfL.jpg)
![HALF OFF PONDS PondBuilder Crystal 4000 GPH Submersible Pump Pond Kit 20' x 20' EPDM Rubber Pond Liner, Waterfall Filter, Skimmer, Lighting & Plumbing Koi Pond Kit, Backyard Water Garden - Image 4](https://m.media-amazon.com/images/I/A1COOtpthoL.jpg)
![HALF OFF PONDS PondBuilder Crystal 4000 GPH Submersible Pump Pond Kit 20' x 20' EPDM Rubber Pond Liner, Waterfall Filter, Skimmer, Lighting & Plumbing Koi Pond Kit, Backyard Water Garden - Image 5](https://m.media-amazon.com/images/I/71ljoOGUrGL.jpg)

## Available Options

This product comes in different **Material Type, Style** options.

## Questions & Answers

**Q: What size pond liner do I need?**
A: Liner Length = Pond Length + (2 × Depth) + 2 feet

**Q: How deep should I make my water feature?**
A: For fish ponds, a depth of at least 18", or deeper is recommended. Healthy fish LOVE to move up and down, as well as side to side!

**Q: What is so special about our Pond Kits?**
A: Our kits are Built with high-quality components, proper sizing, and everything you need in one box. No cheap parts, no cut corners. From powerful pumps to UV protection and tough liners, our kits deliver professional results at a price DIYers love.

**Q: Why choose Half Off Ponds?**
A: When you choose Half Off Ponds, you're choosing quality, savings, and service you can rely on. Join the growing community of satisfied customers who trust us to keep their ponds flowing, clean, and beautiful.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Amazing water-feature!
*by T***T on May 16, 2023*

Just last month had this installed in a freshly dug pond. The product/components appear to be good quality, but here are a list of pros & cons (I will be adding/editing these as I get more months/years out of this):Pros:1. The pond liner appears and feels robust, so hopefully I can get 10-12 years out of it2. The underliner too, and both these are sufficiently big3. The pump is small and quite silent and has been pumping 24/7 for a month now (but I purposely got a couple sizes bigger than what's required for my 1500 gal pond)4. The skimmer assembly appears to be holding up well also, but the way the liner goes on to the skimmer (and also on to the waterfall) is a design deficiency IMO (the design engineers I am sure, can improve the design so as to minimize chances of water leak)Cons:1. for some strange reason, the waterfall is missing a cover (so I spent $89 on Amazon to buy one, and it sits very well)2. the skimmer has a rod that is inserted to hold the filter media in place, I wish there were 2 rods for this since the filter media tends to bulge.3. Filter balls should also be a part of the package (I paid $25 on Amazon to get these separately)4. A pond net would be a nice option (I have to get one at HomeDepot, as I am worried about my kois getting attacked; UPDATE: got a 14x14 bird net of fine black nylon from Home Depot and have stretched it taught on the pond held by the rocks, and as you will see from the photo, it is barely visible--and I sleep well at night knowing the neighborhood cat not going to get to my kois!)All in all, a good product (UPDATE: very happy), I have nice photos and video, will post when I have some time (or if you--the reader--would post a comment here with 'Yes, please post photo'

### ⭐⭐⭐⭐⭐ Great product!
*by S***M on August 2, 2023*

Customer service is excellent. I had an issue with Amazon charging the wrong credit card. The company stepped up and canceled the order so I that could reorder using the correct payment method. The product arrived ahead of the estimated date. All materials were in new condition as expected. The only issue I had was my fault. This is a tremendous amount of work and we will be "tweaking" it for a while to come. The pond kit costs were only about 1/2 of the total cost when you factor in boulders, rocks, plants, chiropractor, ibuprofen, etc. Just something to keep in mind if you are considering doing this.

### ⭐⭐⭐⭐⭐ A+
*by R***B on April 14, 2023*

Such a great deal and fast quality shipping! Everything was top quality shipped fast and properly what a great deal! Very happy with the kit and service and esp price! I will buy again from this seller!

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**Shop now:** [https://www.desertcart.jp/products/88280580-half-off-ponds-pondbuilder-crystal-4000-gph-submersible-pump-pond](https://www.desertcart.jp/products/88280580-half-off-ponds-pondbuilder-crystal-4000-gph-submersible-pump-pond)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-21*