High flow at low head
The right profile for pond exchange and circulation — big volumes moved at low energy per cubic metre, not the high-pressure/low-flow profile of a well pump.
Submersible Water Pump
A submersible pond pump for aquaculture — fish pond submersible pump through to commercial submersible water pump — moves high flow at low head for water exchange, circulation, drainage and transfer. SIGMA offers submersible water pumps for sale in a range from 0.75 kW to 7.5 kW, backed by factory direct supply as experienced submersible pump suppliers. A solids-tolerant impeller passes the suspended matter typical of farm water without clogging, and the sealed motor runs continuously for 24/7 farm duty.
- Flow5–100+ m³/h
- Head5–20 m
- Power0.75–7.5 kW (1–10 HP)
- Duty24/7 continuous
ISO 9001 CE OEM / ODM
15+ years in aquaculture engineering · Trusted by Japfa Group, Japan Nissui & Tropo Farms · Shipped worldwide in one container
Product Description
STP series is the most maturely swimming pool pump and is approved by customers. The pump casing applied an efficient structure design with the max flow, max head, and low noise. Cap and filter is easy to install and unload. The liquid part is made of high reinforce engineering plastic. Applied mechanical seal type ensures watertight in long-time continuous operation. The high reinforce engineering plastic base is vibration-resistance and corrosive-resistance. STP series is the preferred product for sand filters and swimming pools.
Advantage:
- Pressure boosting of medium or large SPA pool and cleaning system of jetted bathtubs, and spa pools.
- Water circulation in the fishery.
- Decorative pool, water display, water processing.
- Weak corrosive liquid (weak acid and weak alkali without solid granules. Liquid temperature: +5-60°C.
Video of Product
Package and Shipment
Specifications
Models & configuration
Flow, head and power are the standard indicative range — final pump ratings are confirmed by SIGMA before shipment.
| Model | Capacity | Typical use | Core configuration |
|---|---|---|---|
| SIGMA-SP-075 | 5–20 m³/h · 5–10 m head | Small-pond water change / drainage | 0.75 kW · cast iron / stainless |
| SIGMA-SP-22 | 20–50 m³/h · 8–15 m head | Mid-size pond circulation | 2.2 kW · debris-tolerant impeller |
| SIGMA-SP-40 | 50–80 m³/h · 10–18 m head | Large-pond water change | 4.0 kW · debris-tolerant impeller |
| SIGMA-SP-75 | 80–100+ m³/h · 12–20 m head | High-flow circulation / drainage | 7.5 kW · stainless optional |
| Type | Submersible pump — drainage / irrigation / circulation duty |
|---|---|
| Flow | 5–100+ m³/h by model; large-flow custom available |
| Head | 5–20 m low-to-medium head, matched to pond exchange and circulation |
| Power | 0.75–7.5 kW (1–10 HP range), sized by flow and head |
| Impeller | Solids-tolerant open / semi-open impeller — passes suspended matter without clogging |
| Motor | Fully sealed, continuous duty — rated for 24/7 running |
| Materials | Cast iron / stainless steel / engineering plastic — fresh and brackish water |
| Options | Float-switch level control, stainless models for seawater, VFD |
System composition
Solids-tolerant impeller
Open / semi-open impeller passes the suspended matter and light debris typical of farm water without clogging.
Continuous-duty motor
Fully sealed motor rated for 24/7 running — drop it in, connect the outlet, and it keeps pumping.
Corrosion-resistant builds
Cast iron, stainless steel or engineering-plastic bodies cover fresh and brackish duty; stainless models for seawater.
One pump, many jobs
Water exchange, circulation, drainage, transfer and filling from the same unit.
Full size range
From small pond circulation pumps to large transfer/drainage units, sized by flow (m³/h) and head (m).
Application
- Water exchange and circulation in ponds and lined tanks
- Water circulation in RAS and biofloc systems, alongside filtration and aeration
- Farm drainage, water transfer and pond filling
- Hatchery water intake and discharge
- Marine farms with the stainless-steel model option
Video
Submersible Water Pump
FAQ
Frequently asked questions
What is a submersible pump used for in aquaculture?
It handles water exchange, circulation, drainage and transfer — drop it in, connect the outlet, and it runs continuously for pond and tank duty.
Why not use a well pump for a pond?
Aquaculture needs high flow at low-to-medium head — large volumes of water moved with low energy per cubic metre — not the high-pressure / low-flow profile of a well pump.
Will the pump clog with pond debris?
A solids-tolerant impeller passes the suspended matter and light debris typical of farm water without clogging, and the sealed continuous-duty motor is rated for 24/7 running.
Can the pump be used in brackish or sea water?
Bodies are corrosion-resistant for fresh and brackish water, with cast-iron or stainless / engineering-plastic options; choose a stainless model for seawater.
Which submersible pump is best for a fish pond?
The best submersible pump for fish pond duty combines a solids-tolerant open impeller (to pass pond debris without clogging) with a fully sealed continuous-duty motor rated for 24/7 running. For small ponds a 0.75–2.2 kW unit handles circulation and water exchange; larger lined ponds or RAS loops need 4–7.5 kW. SIGMA's submersible pumps for sale are sized by flow (m³/h) and head (m) to your specific pond volume and pipe run.
What does a submersible water pump cost, and how does it compare with common pump brands?
Submerged pump price scales mainly with flow (m³/h), head (m) and motor power (kW) — a small 0.75 kW pond unit costs far less than a 7.5 kW farm-drainage pump. Customers sometimes ask us to compare against familiar regional brands like Texmo motor pump, CRI, Crompton or Lubi pumps; SIGMA doesn't resell those brands, but our factory-direct units are built to the same flow/head classes at a competitive landed cost. Send us your target flow and head and we'll quote a matched model.
How is a submersible pond pump different from a non-submersible pond pump?
A submersible water pump for pond duty sits underwater and pushes water out, while a non-submersible pond pump sits dry beside the pond and draws water in through a suction line — submersible units are simpler to install and quieter since the motor is underwater. For the best submersible pond pump on a working fish farm, choose one with a solids-tolerant impeller like SIGMA's; ordinary aqua submersible pump models built for clean garden ponds clog quickly on farm debris.
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Tell us your species, target density and site — our engineers size the system and reply within one business day.
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