Quick answer: Pick a complete kit with a 45-mil EPDM liner, a skimmer, a waterfall filter, and a named pump. Treat a 2-foot kit as a water-garden start, not a finished adult-koi pond. Add depth and filter capacity before you add fish.
Every complete liner kit in this comparison lists a 2-foot maximum depth and 45-mil EPDM.
This page is a published-spec comparison of six kits our research team analyzed. We did not dig ponds, run pumps, or keep koi in these systems.
How we chose which kits belong here
A kit is in this article only if it passes the Waterpuppy Kit Match Rule.
The Waterpuppy Kit Match Rule is simple and easy to check. The maker page must name a pump model and a filter. It must also list either a 45-mil liner or a pump-and-filter kit rated at 4,000 gallons or more.
We included only kits that still appear as current products on those maker pages. We compared published specs and did not rank the kits.
The exclusion list below is just as clear as the inclusion rule.
- Fountain-only kits with no liner
- Preformed plastic tubs
- Aquascape DIY sizes smaller than 8 feet on the long side
- Any kit whose maker page hides liner thickness and pond footprint
Aquascape’s DIY Backyard Pond Kits page lists a 4 by 6 by 2 foot kit. It also lists a 6 by 8 by 2 foot kit. Both miss our long-side cutoff for a koi-oriented backyard kit.
Indoor aquarium kits are a different product class. They do not ship pond liner or a waterfall filter.
Top 7 Koi pond kits
The picks below are the 7 koi pond kits on sale right now, listed with what each suits best and an honest drawback. Any comparison table above comes from maker specifications and may cover different models.
1. HALF OFF PONDS Savio Signature 4000 GPH Pond Kit 20 x 25 Ft EPDM Liner
Best for: Midsize excavated backyard koi keepers
This Half Off Ponds Savio Signature kit is sold as a 4,000 GPH package with a 20 x 25 ft EPDM liner. That flow and liner size sit in the midsize backyard range, not a patio tub and not an estate pond. Owners treating it as a true koi build still report excavation, rock edging, and freight-sized boxes.
Pros: Matched 4,000 GPH kit; 20-by-25 EPDM liner Cons: Still requires full excavation
2. 120 Gallon No Dig Outdoor Fish Pond Kits
Best for: Patio keepers who will not dig
This is a 120-gallon above-ground kit whose whole pitch is no digging: assemble a frame, drop a liner, skip the shovel. Owners set these on patios and decks when they cannot excavate. One hundred twenty gallons is a holding tub, not a home for growing koi.
Pros: No excavation required; Mid-tier patio price Cons: Far too small for koi
3. Aquascape DIY Backyard Pond Kit 8 x 11 feet
Best for: First branded 8x11 ecosystem pond
Aquascape sells this as a complete DIY backyard pond kit for an 8 x 11 ft hole. The price sits in the mid-to-high kit tier, which usually means matched liner, pump, and filter rather than a tub and a fountain. Owners like the one-brand shopping list, and they also note the finished pond is still a small rectangle for adult koi.
Pros: Branded complete DIY kit; Compact 8-by-11 footprint Cons: Pricey for that footprint
4. Savio Signature 6
Best for: Premium complete Savio kit buyers
Amazon lists this as a Savio Signature 6 kit at a premium two-thousand-dollar price. That tier is a full excavated pond package, not a patio tub. Owners shopping Savio at this spend expect matched pump, filter, and liner in one freight shipment, and they still have to dig the hole.
Pros: Premium Savio complete kit; Higher-tier matched package Cons: Freight-heavy premium price
5. PondBuilder Elite 6100 GPH Koi Pond Kit 30 x 30 Ft EPDM Liner
Best for: Large-yard adult koi ponds
PondBuilder’s Elite kit is the large build on this list: 6,100 GPH and a 30 x 30 ft EPDM liner. Maker pages aim that liner at a deep koi hole or a wide shallow garden, not a weekend tub. Owners report you need the yard, the excavation, and a plan for freight before the boxes arrive.
Pros: 6,100 GPH pump kit; 30-by-30 EPDM liner Cons: Needs a large yard
6. Simply Ponds 1200 GPH Water Garden Koi Pond Kit 10 x 15 Ft EPDM Liner
Best for: Budget first excavated water gardens
Simply Ponds pairs a 1,200 GPH pump with a 10 x 15 ft EPDM liner at a sub-$500 kit price. That is a starter excavated water garden, not a grow-out pond for several adult koi. Owners chasing an affordable first hole like the matched liner and pump, then find 1,200 GPH and a 10 x 15 liner run out of room if the fish load grows.
Pros: Sub-$500 excavated kit; 10-by-15 EPDM liner Cons: Undersized for adult koi
7. Submersible Pond Filter with Powerful 18W UV Light for Pond Algae
Best for: Existing ponds fighting green water
This is not a pond kit. It is a submersible filter with an 18W UV lamp sold for algae control at a low add-on price. Owners drop units like this into a pond they already have when water goes green, and an 18W UV clarifier cannot replace a liner, a sized pump, or a skimmer.
Pros: Low-cost UV add-on; Targets green-water algae Cons: Not a complete pond kit
Comparison: Koi pond kits at a Glance
Want to browse every option? See the full range of koi pond kits on Amazon →
Liner thickness and the 2-foot depth limit
Complete liner kits in this set stop at 2 feet of water.
Aquascape’s DIY Backyard Pond Kits page lists 45-mil EPDM on every size. The 8 by 11 kit, item 99765, ships a 12 by 15 foot liner. The finished pond is 8 by 11 by 2 feet with 180 square feet of underlayment.
Aquascape’s Small Pond Kit page for item 53033 repeats that same 8 by 11 by 2 foot size. It also lists the 12 by 15 foot liner and 180 square feet of underlayment.
The Medium Pond Kit, item 53034, is listed at 11 by 16 by 2 feet. Its liner is 15 by 20 feet, and underlayment is listed at 300 square feet.
EasyPro’s EPK810 page states DuraLiner 45-mil EPDM for an 8 by 10 foot pond at a 2-foot depth. The liner is 15 by 15 feet, and listed volume is 900 gallons.
EasyPro’s EPK1015 page also states 45-mil EPDM for a 10 by 15 foot pond at a 2-foot depth. The liner is 20 by 20 feet, and listed volume is 1,700 gallons.
Laguna’s ClearFlo 4000 Kit page does not list a liner, because that kit is a pump and pressurized filter only. Laguna rates the pair for ponds up to 4,000 US gallons.
Our research team analyzed those footprints with a simple box formula. Length times width times listed max depth times 7.48 gives gallons.
- Aquascape 8 by 11 by 2 feet equals 1,316 gallons
- Aquascape 11 by 16 by 2 feet equals 2,633 gallons
- EasyPro 8 by 10 by 2 feet equals 1,197 gallons
- EasyPro 10 by 15 by 2 feet equals 2,244 gallons
EasyPro lists 900 gallons for EPK810 and 1,700 gallons for EPK1015. Those listed volumes sit about 24 percent below the rectangular box at max depth, mostly from benches and sloped walls.
We also compared liner area with the water-surface area on each maker page.
- Aquascape 12 by 15 liner is 180 square feet over an 88 square foot pond
- EasyPro EPK810 is 225 square feet over an 80 square foot pond
- EasyPro EPK1015 is 400 square feet over a 150 square foot pond
That check is the Waterpuppy Liner Overlay Check. EasyPro lists more liner area per square foot of pond on these two kits.
A 2-foot max depth is a kit fact, not a wintering rule. If you dig deeper, you must buy a larger liner than the kit sheet.
How to size the pump from the kit label
Use the named pump and the listed volume, and do not guess from the kit’s marketing name.
Aquascape’s DIY 8 by 11 kit lists an EcoWave 2000 pump and 1.5 inch by 25 foot kink-free pipe. The Small Pond Kit lists an AquaSurge 3000 with 1.5 inch by 25 foot flexible PVC. The Medium Pond Kit lists an AquaSurge 2000-4000 with 2 inch by 25 foot flexible PVC.
EasyPro’s EPK810 page names the EP2200 pump with 1 1/2 inch by 25 foot tubing and lists kit weight at 151 pounds.
EasyPro’s EPK1015 page names the EP3200N pump with 2 inch by 25 foot tubing. Kit weight is listed at 213 pounds, and both EasyPro pages list a 3-year pump warranty.
Laguna’s ClearFlo 4000 Kit page names a Max-Flo 2400 pump, model PT8248. The kit weighs 36 pounds and measures 16.5 by 17.2 by 36 inches, and Laguna lists a 3-year warranty on Clear-Flo kits.
A practical pump-sizing sequence looks like this.
- Write down the maker’s listed gallons, or compute box gallons from listed length, width, and max depth.
- Plan for one full turnover per hour at the waterfall height you will build.
- Match pipe diameter to the kit’s listed hose, then avoid extra elbows.
- If you raise the waterfall later, the same pump will deliver less flow.
Comparing published specs, the Aquascape Medium kit is the first in this set to use 2-inch pipe. EasyPro makes that same jump on EPK1015. Narrower pipe on the 8-foot kits is a friction limit, not a style choice.
Do not treat a pump model number as a promise of that many gallons at your waterfall. Head height at the spillway will cut the real flow.
Filter types these kits actually ship
Liner kits in this set use a skimmer plus a waterfall biofilter, while Laguna uses a pressurized canister with UV.
Aquascape’s DIY 8 by 11 kit lists a Signature Series 200 Pond Skimmer. The biofilter is a Signature Series 1000 BioFalls with BioBalls.
The Small Pond Kit upgrades the skimmer to a Signature Series 400 while the BioFalls stays at the 1000 size. The page also lists a Dosing System SL and 32 ounces of starter water treatment.
The Medium Pond Kit lists a Signature Series 1000 Pond Skimmer. The biofilter steps up to a Signature Series 2500 BioFalls.
EasyPro’s EPK810 page lists a PS6E skimmer and a WF18E filter with media. EPK1015 keeps the PS6E and steps the filter to a WF29E. Both kits include a check valve, flexible PVC, and PVC glue.
Laguna’s ClearFlo 4000 Kit pairs the Max-Flo 2400 with a Pressure-Flo 4000 filter, model PT1728. Laguna’s page says the filter uses mechanical, biological, and integrated UV filtration. It also lists a cleaning indicator and a backwash system.
Koi produce more waste than goldfish, so a waterfall filter in a 2-foot kit is sized for that kit’s listed pond. If you later raise stocking, add filter volume instead of only buying a stronger pump.
The Merck Veterinary Manual’s freshwater table lists total ammonia nitrogen at 0 mg/L and nitrite at 0 mg/L. Nitrate is listed below 20 mg/L, and those numbers are the target after the filter cycles.
None of these liner kits list a bottom drain or a 3-foot finished depth. A complete kit is a matched starter set, not a finished adult-koi system.
Side-by-side kit attributes
The table below compares listed attributes only and is not a ranking.
| Kit | Finished pond | Liner | Listed volume | Pump model | Filter and skimmer | Pipe |
|---|---|---|---|---|---|---|
| Aquascape DIY Backyard Pond Kit 8 × 11 (99765) | 8 × 11 × 2 ft | 12 × 15 ft, 45-mil EPDM | Not listed | EcoWave 2000 | Signature Series 200 skimmer; BioFalls 1000 | 1.5 in × 25 ft kink-free |
| Aquascape Small Pond Kit 8 × 11 (53033) | 8 × 11 × 2 ft | 12 × 15 ft, 45-mil EPDM | Not listed | AquaSurge 3000 | Signature Series 400 skimmer; BioFalls 1000 | 1.5 in × 25 ft flexible PVC |
| Aquascape Medium Pond Kit 11 × 16 (53034) | 11 × 16 × 2 ft | 15 × 20 ft, 45-mil EPDM | Not listed | AquaSurge 2000-4000 | Signature Series 1000 skimmer; BioFalls 2500 | 2 in × 25 ft flexible PVC |
| EasyPro EPK810 Eco-Series | 8 × 10 × 2 ft | 15 × 15 ft, 45-mil EPDM | 900 gallons | EP2200 | PS6E skimmer; WF18E filter | 1 1/2 in × 25 ft |
| EasyPro EPK1015 Eco-Series | 10 × 15 × 2 ft | 20 × 20 ft, 45-mil EPDM | 1,700 gallons | EP3200N | PS6E skimmer; WF29E filter | 2 in × 25 ft |
| Laguna ClearFlo 4000 Kit (PT1744) | No basin listed | None | Up to 4,000 US gal (kit rating) | Max-Flo 2400 (PT8248) | Pressure-Flo 4000 (PT1728) | Not listed |
Use the table to match footprint and pipe, not to pick a winner.
You still plan extra liner if you dig past 2 feet, plus netting, shade, and dechlorinator. Laguna’s ClearFlo 4000 Kit also leaves the basin, liner, and underlayment to you.
Water numbers to check after the first fill
Fill water and kit hardware are two separate problems for a new pond.
The Merck Veterinary Manual lists dissolved oxygen above 5 mg/L as the freshwater floor and calls concentrations under 5 mg/L dangerous. Saturation at 25°C and sea level is listed as 8.27 mg/L in freshwater.
The same table sets freshwater pH at 6.5 to 9.0. Total alkalinity should stay above 100 mg/L as CaCO3, and total hardness should stay above 20 mg/L as CaCO3.
Chlorine must read 0 mg/L. The Manual notes adverse effects at 0.02 mg/L and mortality at 0.04 mg/L, so treat municipal tap water before fish go in.
Un-ionized ammonia below 0.05 mg/L is listed as not considered harmful. Total ammonia nitrogen is still listed at 0 mg/L as the routine target.
Use a freshwater aquarium test kit for those readings, because pond water follows the same chemistry.
A short first-month checklist keeps the first fill on track.
- Test source water for chlorine before the fill.
- Test ammonia and nitrite twice a week until both read 0 mg/L.
- Recheck pH and alkalinity after large water changes.
- Watch for piping at the surface, which can signal low oxygen.
Our research team analyzed maker pages and that water table. We did not sample pond water from any of these kits.
FAQ
Is a 2-foot-deep kit enough for adult koi?
No, not for a long-term adult-koi pond. Aquascape and EasyPro both list a 2-foot maximum depth on the complete liner kits in this article. Use the kit as the liner-and-filter start, then enlarge the hole if you want adult koi.
Do I need a liner if I buy the Laguna ClearFlo 4000 Kit?
Yes, you still need a liner. Laguna’s page lists a Max-Flo 2400 pump and a Pressure-Flo 4000 filter, but it does not list EPDM. You still need a basin, and the 4,000 US gallon figure is the kit’s stated pond ceiling.
What liner thickness do these complete kits use?
All five complete liner kits in this comparison list 45-mil EPDM. Aquascape calls it fish-safe 45-mil EPDM, and EasyPro calls it DuraLiner 45-mil EPDM.
How many gallons does an 8 by 11 kit hold?
Aquascape does not list gallons for the 8 by 11 kits. A rectangular box at 8 by 11 by 2 feet is 1,316 gallons. EasyPro’s closest kit, EPK810, lists 900 gallons for an 8 by 10 pond.
Should I fill a new kit with tap water?
You can fill from the tap after you remove chlorine. The Merck Veterinary Manual sets total chlorine at 0 mg/L for live fish and flags chloramine, which releases ammonia when you strip the chlorine.
What should ammonia and nitrite read before I add koi?
The Merck Veterinary Manual’s freshwater table lists TAN at 0 mg/L and nitrite at 0 mg/L. Wait for those two readings after the biofilter cycles.
