Rigid, decades-long service
High mechanical strength with corrosion and UV resistance — an FRP tank works indoors or outdoors for decades.
The rigid, decades-long tank — a fiberglass-reinforced plastic (FRP) fish tank with a smooth gel-coat interior, optional viewing window, and high mechanical strength, perfect for RAS, hatcheries, indoor farms and live-fish holding where a permanent, easy-to-clean, food-safe vessel is needed.
15+ years in aquaculture engineering · Trusted by Japfa Group, Japan Nissui & Tropo Farms · Shipped worldwide in one container
Product Description
Advantage:
1. Our fiberglass fish tanks are both lightweight and extremely durable, made from a tough Fiberglass exterior that is 100% waterproof.
2. Non-corrosive & maintenance-free, requiring only soapy water for normal cleaning.
3. Easily withstands harsh elements without fear of cracking, splitting, or warping.
4. Finish provides a long-lasting, protective finish that is resistant to fading, scratching, chipping, and even intense UV light, for a new or weathered look that maintains its fresh character day after day. Serving life for more than 15 years.
5. Size: customized size
6. Shape: customized
7. Technique process: L-RTM










Specifications
Indicative sizes integrated from the standard round range — tanks are molded to order, so diameter, wall height, color, drains and window are confirmed per project.
| Model | Capacity | Typical use | Core configuration |
|---|---|---|---|
| SIGMA-FRP-1 | |||
| SIGMA-FRP-2 | |||
| SIGMA-FRP-3 | |||
| SIGMA-FRP-4 | |||
| SIGMA-FRP-R | |||
| SIGMA-FRP-W |
| Material | Fiberglass-reinforced plastic (FRP / GRP) with food-grade gel-coat interior |
|---|---|
| Interior | Smooth gel-coat — resists algae build-up, easy to clean and disinfect |
| Shapes | Round / rectangular / D-end, adjustable wall height |
| Drainage | Central drain / side drain / dual-drain (Cornell-type) for RAS solids removal |
| Options | Viewing window, overflow standpipe, reinforcing ribs, insulation, transport-tank version |
| Water type | Freshwater / saltwater |
| Working conditions | RAS, hatchery and nursery, broodstock / quarantine, indoor intensive culture, live-fish holding and hauling |
System composition
High mechanical strength with corrosion and UV resistance — an FRP tank works indoors or outdoors for decades.
Resists algae adhesion and disinfects quickly between cycles for fast batch turnaround.
Popular for display, broodstock observation and live sales — a high-value option on fiberglass tanks.
Dual-drain (Cornell-type) outlets remove solids efficiently for recirculating systems.
Non-toxic FRP works in freshwater and seawater for food fish and shrimp.
Diameter, wall height, color, drains and window all customizable — including hauling / transport tank versions.
Application
Video
FAQ
FRP is rigid, high-strength, non-toxic, corrosion-proof and UV-stable, with a smooth food-grade gel-coat interior that resists algae and is easy to disinfect — giving decades of service indoors or out.
Yes — an optional viewing window is popular for display, broodstock observation and live-sales, along with central/side or dual-drain (Cornell-type) outlets for RAS solids removal.
Tanks are molded to order in round, rectangular and D-end shapes from small hatchery/nursery units to large commercial tanks, with diameter, height, colour, fittings and window all customizable.
Yes — the smooth bore suits fish hauling / transport tanks as well as RAS, hatcheries, broodstock, quarantine and indoor intensive farming, in fresh and sea water.
Tell us your species, target density and site — our engineers size the system and reply within one business day.