The biofloc farmer's first tank — a welded PVC-coated tarpaulin fish tank that turns any flat ground into a high-density culture pond in hours: no concrete, no excavation, just a galvanized or PVC-pipe frame and a leak-proof 650–900 GSM PVC liner, ready for tilapia, catfish, shrimp and biofloc systems.
15+ years in aquaculture engineering · Trusted by Japfa Group, Japan Nissui & Tropo Farms · Shipped worldwide in one container
PVC fish tank is best solution for aquaculture project,
No need to dig the pond, easy to install, quick start fish farms.
Life time 16 years warranty.
Benefit
Quick start your aquaculture project.
Galvanized steel pipes rust-proof.
It only take one hour to finish 16 x 1.2m circular tank, without any experience.
Our videos recorded by customer, If you need installation and operation videos, contact us directly, our engineers will answer your questions,
Whole fish tank life time 16 years warranty.
3.8m x 1.2m
6m x 1.2m
8m x 1.2m
16m x 1.2m
Normally, It is 1.2-1.5m, but we can customize height.
It is easy to install, even you don’t have any experience, It will take 1 hour for installing 16m x 1.2m, no need machines, no need welder. just by hand to install.
We use high temperature resistant material of tank liner, it is food grade material, very safe for fish/shrimp.
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 sizes integrated from the standard round range — diameter, GSM grade, shape and fittings are confirmed per order by SIGMA's own welding line.
| Model | Capacity | Typical use | Core configuration |
|---|---|---|---|
| SIGMA-PVC-3 | ~8–10 m³ (Ø3.0 × 1.2 m) | Nursery / standard biofloc | 700 GSM · round |
| SIGMA-PVC-5 | ~25 m³ (Ø5.0 × 1.3 m) | Standard biofloc grow-out | 750 GSM · round |
| SIGMA-PVC-10 | ~100 m³ (Ø10 × 1.3 m) | Commercial grow-out | 750 GSM · round |
| SIGMA-PVC-20 | ~470 m³ (Ø20 × 1.5 m) | Large commercial grow-out | 750 / 900 GSM · round |
| SIGMA-PVC-35 | ~1,440 m³ (Ø35 × 1.5 m) | Largest single round tank | 900 GSM · round |
| SIGMA-PVC-R | Per order (L × W × H) | Custom rectangular / square | 700 / 750 GSM |
| Liner material | PVC-coated tarpaulin (canvas), welded in-house by SIGMA |
|---|---|
| GSM grades | 650 / 700 / 750 / 900 GSM |
| Welding | High-frequency / hot-air welded — seamless and leak-proof, not glued |
| Frame | Galvanized steel pipe / PVC pipe / steel-wire mesh frame |
| Fittings | Bottom / side drain, overflow, inlet, aeration ports, ladder (optional) |
| Species | Tilapia, catfish, shrimp, koi and biofloc culture |
| Working conditions | Biofloc / RAS nursery / high-density culture — indoor, outdoor, rooftop or rented land |
System composition
High-frequency / hot-air seamless welding — no glue joints — for a leak-proof skin that outlasts stitched or bonded tanks.
Choose 650–900 GSM by budget and service life; heavy-duty 900 GSM suits commercial high-intensity use.
Bottom sludge drain, high water column and resistance to fish-waste acids — the standard vessel for biofloc fish farming.
No excavation, no concrete — installs on flat ground, rooftops or rented land, and can be dismantled and relocated.
Costs far less than a concrete or earthen pond, so the tank pays back fast.
Size, shape, GSM grade and fittings made to order — round, square or rectangular.
Application
Video
FAQ
It is a portable, above-ground tank built from a PVC-coated tarpaulin liner, high-frequency or hot-air welded (not glued), stretched over a galvanized steel or PVC-pipe frame.
The liner is available in 650, 700, 750 and 900 GSM grades; a higher GSM gives longer service life, with heavy-duty 900 GSM suited to commercial use.
Round, square and rectangular shapes are offered, with round-tank diameters from 3 m up to 35 m and volumes from ~8–10 m³ up to ~1,440 m³ per unit at a 1.2–1.5 m water depth.
It is affordable, installs in hours with no concrete or excavation, can sit on rooftops or rented land, and can be fitted with a bottom outlet for biofloc sludge removal — the standard vessel for biofloc, RAS nursery and intensive monoculture.
Related equipment
Durable HDPE fish-farming tanks — on-site welding, 15-year liner, lower cost than earthen ponds. Any diameter & depth. SIGMA ships worldwide. Get sizes & a quote in 12h.
View details →
Corrosion-proof FRP (fiberglass) fish tanks for hatcheries, RAS & live-holding. Custom shapes & sizes, smooth food-safe surface. Manufacturer-direct from SIGMA. Get a quote.
View details →
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.
View details →
Micro/nano-bubble oxygen diffuser pipes & aeration hose for biofloc and pond fish farming — fine bubbles, high oxygen transfer, clog-resistant. 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.
