The cost-effective alternative to tarpaulin — an HDPE geomembrane-lined fish tank with thermally-welded, fully sealed and root-proof seams at a lower cost than welded PVC tarpaulin, ideal for tilapia, shrimp and biofloc farms and for lining large excavated or banked culture ponds.
15+ years in aquaculture engineering · Trusted by Japfa Group, Japan Nissui & Tropo Farms · Shipped worldwide in one container
HDPE fish tank is the better way for aquaculture project than earthen pond. The water quality is easy to manage. investment lower.
Benefit
Welding experience needed required on your fish farm
The wire fence easy to rust, life time 5-6 years.
Our videos recorded by customer, If you need installation and operation videos, contact us directly, our engineers will answer your questions,
hdpe tank liner 15 years. wire fence life time 5-6 years.
Yes, HDPE material is acid and alkaline resist.
Non-toxic, food grade. the HDPE granule get US FDA certificate.
resistant upto 100 degrees.
No, the hdpe material is rigid, can’t be folded after welding. we just send you hdpe membrane sheets by roll. you have to weld it after delivery.
SIGMA Aquaculture (SIGMA INDUSTRIES CO.,LTD)located in North of China Shandong Province, We have 15 years experience in Aquaculture equipments manufacturing. Our factory focus on Biofloc fish tank producing. Both PVC and HDPE material available. We also provide relevant equipments from partners for customers. such as aeration equipments and accessories.
Specifications
Indicative formats integrated from the standard range — thickness, size, frame and fittings are made to order on SIGMA's own membrane-welding line.
| Model | Capacity | Typical use | Core configuration |
|---|---|---|---|
| SIGMA-HDPE-S | ~4–10 m³ | Framed round tank Ø2–3 m | 0.5–0.75 mm membrane |
| SIGMA-HDPE-M | ~15–30 m³ | Framed round tank Ø4–5 m | 0.75–1.0 mm membrane |
| SIGMA-HDPE-L | Hundreds to thousands of m³, per site | Excavated / banked lined pond | 1.0–1.5 mm membrane |
| SIGMA-HDPE-R | Per order (L × W × H) | Rectangular, custom | 0.75–1.0 mm membrane |
| Liner material | HDPE geomembrane — food-grade, non-toxic |
|---|---|
| Thickness options | 0.5 / 0.75 / 1.0 / 1.25 / 1.5 mm (500–1500 µm) |
| Welding | Hot-wedge / extrusion welding — fully sealed, leak-proof and root-proof seams |
| Frame / format | Galvanized steel pipe or steel-wire frame (above-ground), or excavated / banked pond liner |
| Fittings | Bottom / central drain, overflow, inlet, aeration ports |
| Species | Tilapia, catfish, shrimp and biofloc culture |
| Working conditions | High-density grow-out, biofloc, RAS reservoir / holding — indoor or outdoor |
System composition
Hot-wedge / extrusion welds give fully sealed, high-strength seams that resist leaks and root penetration.
HDPE geomembrane costs less than welded PVC tarpaulin for the same area — the economical choice for large footprints and excavated lined ponds; a factory-welded PVC tarpaulin tank, by contrast, needs no on-site welding and offers a longer service life.
HDPE is safe for food fish and shrimp, keeping culture water clean.
0.5–1.5 mm to match budget and lifespan; heavy gauges suit large excavated ponds.
Above-ground framed round tanks, excavated lined ponds, banked reservoirs or custom rectangles.
Size, membrane thickness, frame and fittings made to order.
Application
FAQ
It uses a high-density polyethylene (HDPE) geomembrane liner — the same material used for industrial water containment — joined by hot-wedge / extrusion welding for fully sealed, leak-proof seams.
Each has its strengths: a PVC tarpaulin tank leaves the factory fully welded — no on-site welding — and offers a longer service life, while HDPE geomembrane costs less and is welded panel by panel on site, making it the economical choice for large-area and excavated / banked lined ponds.
The geomembrane is supplied in thicknesses from 0.5 mm to 1.5 mm (500–1500 micron); a thicker membrane gives longer service life and suits large excavated ponds.
It is widely adopted for tilapia, catfish and shrimp culture, biofloc systems, and RAS make-up or reservoir basins, in round or rectangular shapes from small nursery units to large commercial ponds.
Related equipment
Modular PVC fish-farming tanks — quick assembly, energy-saving, food-safe liner, lower cost than concrete. Any size for biofloc & RAS. Factory-direct from SIGMA. Get a quote.
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Galvanized steel fish-farming tanks with food-grade liner — strong, fast on-site assembly, long service life. Custom diameters for fish & shrimp. Factory-direct from SIGMA. Get a quote.
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High-efficiency roots blowers for biofloc, RAS & pond aeration. Direct-from-factory pricing, multiple capacities, worldwide export. Request specs & a quote from SIGMA engineers.
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Energy-efficient paddle wheel aerators for shrimp & fish ponds — strong circulation & oxygen transfer, durable impellers. Multiple sizes, factory-direct from SIGMA. Get a quote.
View details →Tell us your species, target density and site — our engineers size the system and reply within one business day.
