| 1 | Levelling, sand fill and compaction (about 620 m²) | Site levelling 180,000–300,000 ₫/m² (Rồng Đất); sand fill 180,500 ₫/m³ (VMSTEEL) | $4,800 | $700 | $5,500 |
| 2 | Concrete yard for trucks (100–150 m²) | 450,000–700,000 ₫/m² (Rồng Đất) | $2,900 | $500 | $3,400 |
| 3 | Foundations: pad footings and tie beams (510 m²) | 366,000 ₫/m² (Thép Ống Đúc); 450,000–750,000 ₫/m² (Rồng Đất) | $7,900 | $1,200 | $9,100 |
| 4 | Steel frame (8.2–12.2 t) | Steel 25,000–35,000 ₫/kg (VMSTEEL); 27,000–38,000 ₫/kg (Rồng Đất) | $14,200 | $2,100 | $16,300 |
| 5 | Insulated PU roof (about 420 m²) | 300,000–480,000 ₫/m² (Rồng Đất) | $6,900 | $1,000 | $7,900 |
| 6 | Clear polycarbonate roof, vegetable house (about 100 m²) | 6 mm twin-wall sheet 810,000 ₫ for 12.2 m² (Vinaspc); installed 250,000–600,000 ₫/m² (our estimate) | $1,800 | $300 | $2,100 |
| 7 | Fish-block walls: 1.2 m brick base + sheet walls | Brick or block wall 235,000 ₫/m², sheet wall 246,000 ₫/m² (Thép Ống Đúc); brick 1,250,000 ₫/m³ (VMSTEEL) | $3,100 | $500 | $3,600 |
| 8 | Roll-up door with motor, steel doors, louvres | Roll-up door 850,000 ₫/m², louvres 550,000 ₫/m² (Thép Ống Đúc) | $2,000 | $300 | $2,300 |
| 9 | 150 mm reinforced floor slab laid to falls (510 m²) | 100 mm slab 292,000 ₫/m² + floating 20,000 ₫/m² (Thép Ống Đúc); M250 concrete 1,250,000 ₫/m³, rebar 22,500 ₫/kg (VMSTEEL) | $8,600 | $1,300 | $9,900 |
| 10 | Epoxy or sealer on the wet areas (about 320 m²) | 120,000–350,000 ₫/m² (Rồng Đất) | $2,000 | $300 | $2,300 |
| 11 | In-ground concrete biofilter (20 m³) and pump tank (8 m³) | M250 concrete 1,250,000 ₫/m³, rebar 22,500 ₫/kg, formwork 160,500 ₫/m², digging 20,000 ₫/m³ (VMSTEEL) | $6,200 | $900 | $7,100 |
| 12 | Lighting, IP65 sockets, domestic water (510 m²) | 150,000–400,000 ₫/m² (VMSTEEL, Rồng Đất) | $4,300 | $700 | $5,000 |
| 13 | Gutters and downpipes (about 66 m) | 85,000 ₫/m (Thép Ống Đúc) | $300 | $0 | $300 |
| 14 | Clean-zone walls, walls between the zones, room walls (about 300 m²) | Finished block wall 380,000–720,000 ₫/m² (VMSTEEL rates, Thép Ống Đúc) | $6,300 | $1,000 | $7,300 |
| 15 | Trench drains with gratings; raised bases for the 7 m tanks and machine plinths | M250 concrete 1,250,000 ₫/m³, formwork 160,500 ₫/m², rebar 22,500 ₫/kg (VMSTEEL); gratings: our estimate | $5,600 | $800 | $6,400 |
| 16 | Other building items | No public price (our estimates): outside drains, a septic tank for the WC and the water connection; the vegetable-house outside walls; the 3-phase supply, meter cabinet and incoming cable; the main board and sub-boards, surge and lightning protection and earthing; power and signal cables to about 16 motors, the UV, fans and the 42 boxes; plumbing labour; a fence, gate and cameras; the builder's site costs | $17,500 | $2,600 | $20,100 |
| Building & site — total | | $94,400 | $14,200 | $108,600 |
| 17 | Design: architecture, structure, wiring, plumbing, fire | 80,000–170,000 ₫/m² (Rồng Đất, ATV) | $2,700 | $400 | $3,100 |
| 18 | Soil investigation | 15–25 million ₫ (Thép Ống Đúc) | $900 | $200 | $1,100 |
| 19 | Other engineering items | No public price (our estimates): permits; part-time site supervision by a licensed engineer; an independent check of the gravity water levels by an experienced recirculating-farm engineer; electrical inspection and EVN acceptance; a safety inspection of the oxygen line; food-safety and business paperwork; commissioning by the suppliers; the fire file and fire-team training; a legal check of the contracts | $4,800 | $700 | $5,500 |
| Engineering, permits & design — total | | $8,400 | $1,300 | $9,700 |
| 20 | Aquamina D7 round fish tanks × 2 (7 m across, 50 m³ of water each) | Aquamina D7: price on request. Same type, 7.3 m with a 1.2 m wall: frame 10.4 million ₫ + liner 5.3 million ₫ + drain kit 0.6 million ₫ (Thanh Dat Vina) | $2,200 | $300 | $2,500 |
| 21 | Aquamina D4 purge tank (≈ 10 m³) and D3 treatment tank (7 m³) | Price on request (Aquamina D4, D3). A 4.5 m round tank: frame 6.5 million ₫ + liner 2.6 million ₫ (Thanh Dat Vina) | $800 | $100 | $900 |
| 22 | Other tank items | No public price (our estimates): 2 dual-drain kits, and delivery with a crane for the big items | $900 | $300 | $1,200 |
| Fish tanks — total | | $3,900 | $700 | $4,600 |
| 23 | Gravity drum filter ≈ 150 m³/h, 60–75 µm, 316L mesh, wash pump | 100 m³/h units: $3,480 (Raufilter, plastic body), $4,999–5,500 (Top Industry, steel body), $5,295 (Aqua Exclusive); eWater: quote needed | $5,600 | $1,400 | $7,000 |
| 24 | Radial-flow settler ≈ 2 m across (fibreglass cone ≈ 5 m³) | Fibreglass tanks 4–5 million ₫ per m³ (boncomposite) | $1,100 | $300 | $1,400 |
| 25 | Foam fractionator 20–25 m³/h, blower-fed, no ozone | ZKAQUA recirculating-farm skimmers $560–9,200; ZKAQUA 100 m³/h unit $4,250 | $1,800 | $400 | $2,200 |
| 26 | Stainless-steel 316L UV, ≈ 110 m³/h (2.56 kW class) | ZKAQUA 200 t/h, 2,560 W: $3,846 a set (the dose at 65% UV transmittance still to confirm) | $4,700 | $1,200 | $5,900 |
| 27 | K1 moving-bed media, 10 m³ (a 50% fill of the 20 m³ biofilter) | 4.29–4.59 million ₫/m³ (Thiet Bi Cong Nghiep Sai Gon); 6.0 million ₫ for 1 m³ (Nam Trung Viet) | $1,900 | $300 | $2,200 |
| 28 | Other water-cleaning items | No public price (our estimates): the air grid, outlet sieve and fittings of the 20 m³ biofilter (the tank itself is built in concrete, in the building row); a 10 m³ sludge tank, a portable sludge pump and a wet-season drying bag; the lime + KOH dosing set; a 3 m³ lined holding tank for treatment water; a carbon filter, buffer tank and booster pump for tap water | $3,600 | $900 | $4,500 |
| Water cleaning — total | | $18,700 | $4,500 | $23,200 |
| 29 | Return pumps × 2: 3 kW low-head 4-pole, 110 m³/h at ≈ 4 m | Price guide: Ebara 3D 65-125/5.5 at 29.0–30.1 million ₫ (Quoc Dan, Anh Duong Vina); a 4-pole pump of the same class is needed | $2,500 | $400 | $2,900 |
| 30 | Speed drives × 4, 4 kW | Elektrim EMD800-4R0-3B: 4.16 million ₫ before VAT | $900 | $200 | $1,100 |
| 31 | Roots blowers × 2 for the biofilter (2.2 kW) | Heywel RSS-50: 22.25 million ₫ before VAT | $2,200 | $200 | $2,400 |
| 32 | Ring blowers × 3 for the tanks (3 kW, 2 run + 1 spare) | Hong Helong HB-3000S: 10.97 million ₫ | $1,600 | $200 | $1,800 |
| 33 | Fine-bubble diffusers (≈ 110 discs) and tray air stones | Discs 160,000–300,000 ₫ each | $1,100 | $100 | $1,200 |
| 34 | uPVC pipe (200/250 mm gravity lines, smaller runs) | Binh Minh list: Ø168 PN6 262,332 ₫/m, Ø114 PN6 126,360 ₫/m (incl. 8% VAT) | $1,400 | $400 | $1,800 |
| 35 | Pipe fittings (elbows, tees, flanges, reducers) | Binh Minh: 90° elbow Ø168 177,300 ₫; flange Ø168 434,800 ₫ (before VAT) | $1,000 | $300 | $1,300 |
| 36 | Valves (200 mm knife-gates, 114/90 mm, checks, isolation) | Aquamina PVC knife-gate valves: price on request | $2,400 | $700 | $3,100 |
| 37 | Fish-hall exhaust fans × 2 (900 mm, 0.55 kW) | 3.30 million ₫ a fan before VAT | $300 | $100 | $400 |
| 38 | Other items | No public price (our estimates): glue, supports and hangers; a blower-room fan with a filtered intake from outside | $400 | $100 | $500 |
| Pumps, air, pipes & ventilation — total | | $13,800 | $2,700 | $16,500 |
| 39 | 40 L oxygen cylinders × 6, first fill | 2.8 million ₫ each (Phu Thinh Gas; others 2.1–2.9 million ₫) | $700 | $200 | $900 |
| 40 | Normally-open oxygen-service valves × 4 (C19–C22) | ASCO oxygen-service valves $493–799 (US reseller); no Vietnamese listing | $700 | $200 | $900 |
| 41 | Other oxygen items | No public price (our estimates): a manifold in two banks of 3 cylinders with automatic changeover and an industrial regulator (≥ 5 m³/h); a shaded, chained, ventilated cylinder cage; 4 flowmeters; 16 ceramic oxygen discs; about 80 m of oxygen-safe tubing; the P8 pressure sensor and box; the 4 valve control boxes; installation and a leak test | $3,000 | $700 | $3,700 |
| Backup oxygen — total | | $4,400 | $1,100 | $5,500 |
| 42 | Deep-flow trays ≈ 43 m² (benches, liner, rafts, net cups) | HDPE liner 0.75 mm 35,000–40,000 ₫/m²; net cups 1,200 ₫ (Hachi) | $1,200 | $200 | $1,400 |
| 43 | Nursery rack 4 m² with ≈ 500 W of LED tubes | Hachi HC25W LED tube: 270,000 ₫ | $500 | $100 | $600 |
| 44 | Shade screen 30–40%, ≈ 110 m², with pull system | Shade net 25,000–27,000 ₫/m²; motor 1.8–2.5 million ₫ (Hachi) | $300 | $0 | $300 |
| 45 | Vegetable-house exhaust fans × 2 (900 mm, 0.55 kW) | 3.30 million ₫ a fan before VAT | $300 | $0 | $300 |
| 46 | Cooling pad ≈ 8.6 m² with frame, gutter and pump | 1800 × 600 × 150 mm pad: 380,000 ₫ a sheet (others 420,000–580,000 ₫) | $400 | $100 | $500 |
| 47 | Other items | No public price (our estimate): 4 air-circulation fans over the crops | $200 | $100 | $300 |
| Vegetables — total | | $2,900 | $500 | $3,400 |
| 48 | Optical DO probes × 6 with wiper (Yosemitech Y508-A) | No public price; Yosemitech's Y521-A conductivity probe lists at $290–350 (our estimate: $750 each) | $5,300 | $1,000 | $6,300 |
| 49 | pH probes × 6 (Yosemitech Y532-A) | No public price (our estimate: $260 each) | $1,800 | $400 | $2,200 |
| 50 | TDS probes × 6 (DFRobot SEN0707) | $159.00 each | $1,100 | $200 | $1,300 |
| 51 | BME688 air sensors × 8 and PAR light sensors × 2 | BME688 $19.95 (Adafruit); Renke PAR $50 | $300 | $100 | $400 |
| 52 | 80 GHz radar level sensors × 3 (S1 and S2, optional; S7 on the pump tank) and the pump-tank float switch | Radar: $1,429 (Baymeters, US retail); $1,555.86 (ATO); our estimate ≈ $700 each direct from the maker (quote needed). Float switch: MAC 3 with a 5 m cable, 820,000 ₫ before VAT (Máy Bơm Châu Á); the relay beside the pump drives: our estimate | $2,500 | $500 | $3,000 |
| 53 | Pressure sensors × 7 on the water and air pipes (P1–P7) | RS485 flush-diaphragm units $22–110 (no Star Meter listing) | $500 | $100 | $600 |
| Sensors — total | | $11,500 | $2,300 | $13,800 |
| 54 | ESP32-S3 relay boards × 37 (Waveshare) | $17.99–19.99 each | $800 | $200 | $1,000 |
| 55 | Other box items | No public price (our estimates): 37 IP65 enclosures with power supplies, glands, DIN rail and terminals; control parts for 21 machines (breaker, contactor, hand-off-auto switch, lamps); RS485 cable, sensor holders and pressure taps, and the radar bracket over the pump tank; installation and wiring, with the float switch wired into the return pumps' control circuit; the radio paperwork for the 42 Wi-Fi boards | $4,100 | $800 | $4,900 |
| Sensor & control boxes — total | | $4,900 | $1,000 | $5,900 |
| 56 | Mac mini farm computer (32 GB RAM, 2 TB), Wi-Fi and a 4G backup router, an online UPS (1–2 kVA) and a long-run battery pack | No public price (our estimates) | $4,000 | $400 | $4,400 |
| Farm computer, network & UPS — total | | $4,000 | $400 | $4,400 |
| 57 | Walk-in chiller ≈ 5 m³ (fish and vegetables) | 8 m³ cold room 40–60 million ₫ (Thinh Vuong); fish cold room 8–10 m³ 65–95 million ₫ (Dien Lanh Mien Nam) | $1,900 | $300 | $2,200 |
| 58 | Other items | No public price (our estimates): an ice maker (about 100 kg a day); scales; the lab kit (ammonia, nitrite, nitrate and alkalinity tests, handheld DO and pH meters); nets, crates and tubs for a 3,500 kg harvest; fire-safety kit; footbaths, hand-wash and first aid; lab bench and sink, shelves and office furniture; an air conditioner, fridge and lockers; tools and safety gear; a microscope; a chemical cabinet with an eyewash; a pressure washer | $6,400 | $1,500 | $7,900 |
| Cold chain, lab, tools & safety — total | | $8,300 | $1,800 | $10,100 |
| 59 | Spare K1 media, 1 m³ kept ready | 4.29–4.59 million ₫/m³ (Thiet Bi Cong Nghiep Sai Gon); 6.0 million ₫ for 1 m³ (Nam Trung Viet) | $200 | $0 | $200 |
| 60 | Other spares | No public price (our estimates): the starting kit (2 pH electrodes, a drum screen panel, membranes, pump seals, fuses, 2 UV lamps) and critical spares (a DO probe, an oxygen valve, a speed drive, a ring-blower motor, a control-box kit, a pressure sensor) | $2,200 | $700 | $2,900 |
| Spare parts — total | | $2,400 | $700 | $3,100 |