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Grow-out Pangasius

Bacillary necrosis, hemorrhage, rising FCR — losing the pond

High-density pangasius easily breaks out with bacillary necrosis (Edwardsiella ictaluri) and hemorrhage when the pond environment turns bad. Than Vuong: stabilize environment + protect liver + treat the right agent.

Pond environmentLiver protectionTreat E. ictaluri
Grow-out pangasius

Successful grow-out pangasius needs: (1) managing the high-density pond — water exchange, bottom probiotics (SOILMAX New, MAX 4000), NH3/NO2 removal (YUCCA C); (2) liver and gut protection with HERB GUARD, MAX LIVER, PRO GUT plus immunity boosters AQUAMOS/BETAGLUCAN; (3) on disease: treat Edwardsiella ictaluri necrosis with FLOR-MAX, Aeromonas hemorrhage with OXYTETRA/DOXYPA, parasites with AQUA PRAZI — always observe the pre-harvest withdrawal period.

Quick Summary

Problems

  • High density, waste builds up on bottom
  • Bacillary necrosis (E. ictaluri), hemorrhage (Aeromonas)
  • Parasites, pale liver & gills

Signs

  • Off-feed, sluggish, drifting to banks
  • White necrotic spots on liver/kidney, fin-base hemorrhage
  • Swollen belly, pale gills, surfacing

Solutions

  • Bottom probiotics + toxic-gas removal
  • Liver protection + regular immunity boost
  • Treat the right agent + disinfect water
Solutions by issue

Effective Grow-out pangasius farming

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Biology & model

Grow-out pangasius: high density, FCR is key

Pangasius is raised in high-density earthen/floating ponds on pellets. Organic load and FCR decide profit — a bad environment weakens the liver, invites disease and spikes FCR.

  • Stock 40–60 fish/m²; pellet feed in several meals.
  • Target FCR 1.5–1.7; 6–8 months to 0.8–1.2 kg.
  • Late crop has very high organic load — bottom and liver care are priorities.
Density40–60 /m²
FCR1,5–1,7
Harvest6–8 months
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Pond environment

Bottom & toxic-gas management at high density

Excess feed and feces build up, raising NH3/NO2/H2S and lowering bottom oxygen. Water exchange + bottom probiotics + toxic-gas removal keep the pond stable and the liver healthy.

  • Regular SOILMAX New + MAX 4000 to decompose the bottom, cut toxic gas.
  • Apply YUCCA C / NITROBAC to absorb NH3 when gas rises.
  • Exchange water and boost oxygen, especially late-crop.
Safe NH3< 0,1 mg/l
Late-crop exchange20–30%/day
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Common diseases

Bacillary necrosis & hemorrhage — treat the right agent

Bacillary necrosis (Edwardsiella ictaluri) and Aeromonas hemorrhage cause mass mortality. Identify the agent to use antibiotics effectively and avoid resistance.

  • Necrosis: white pus spots on liver/kidney/spleen → FLOR-MAX.
  • Aeromonas hemorrhage: red fin base/anus → OXYTETRA / DOXYPA.
  • Parasites (gill flukes, Trichodina) → AQUA PRAZI; disinfect with WORK 80.
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Liver & immunity

Healthy liver — strong immunity — lower disease risk

The liver is the most stressed organ in high-density pangasius. Protecting liver + gut + regular immune support helps fish cope, feed strongly and reduces antibiotic use.

  • Feed HERB GUARD + MAX LIVER to protect and restore the liver.
  • PRO GUT / BIOMAX stabilize the gut, improve absorption.
  • AQUAMOS + BETAGLUCAN GRO + CANFORTA raise immunity regularly.
Protocol

5-step farming & treatment protocol

1
Environment

Regular SOILMAX New + MAX 4000 for the bottom; apply YUCCA C when gas is high; exchange water + boost oxygen.

2
Liver & gut

Feed HERB GUARD + MAX LIVER + PRO GUT to protect liver and gut; CANFORTA for vitamins and appetite.

3
Boost immunity

AQUAMOS + BETAGLUCAN GRO regularly, intensified at season change or environmental swings.

4
Treat necrosis

Cut feed, use FLOR-MAX for Edwardsiella ictaluri per dose, with HERB GUARD for liver recovery.

5
Hemorrhage / parasites

OXYTETRA / DOXYPA for Aeromonas; AQUA PRAZI for parasites; disinfect with WORK 80 / POWER GLUTA. Observe pre-harvest withdrawal.

When something goes wrong

Protocols by observed sign

Decided by what you can see at the pond, no antibiogram needed. Each protocol carries exact doses, day-by-day steps and the withdrawal period.

Mang nhợtGan sưngBụng trươngHậu môn lồi

QT-01

Bacillary necrosis

This one cannot be judged from the outside. Open 5–10 fish to see the white pus spots on liver, kidney and spleen — the only reliable sign.

Withdrawal: 4 weeks

Gốc vây lưngGốc vây ngựcXuất huyết thânGốc vây hậu mônGốc đuôi

QT-02

Haemorrhagic septicaemia

Unlike bacillary necrosis, this one shows from the outside: redness at the fin bases, around the vent and on the flank.

Withdrawal: 4 weeks

Đốm mủ nội tạngGốc vây lưng đỏHậu môn đỏXuất huyết thân

QT-03

Co-infection: haemorrhage and bacillary necrosis

Usually appears after a first course that did not clear. The document names the cause plainly: a dragged-out treatment and repeated antibiotic courses.

Withdrawal: 4 weeks

Mang nhợt trắngGan nhợt trắngCá ăn yếu kéo dài

QT-04No antibiotic

White liver, white gill from repeated antibiotics

Farmers often mistake this for a fresh bacterial infection and feed more antibiotic, deepening the loop.

Withdrawal: None

Mang — soi tìm sán, trùngTuột nhớt trên thânCá gom nhóm, rộ đàn

QT-05No antibiotic

External parasites

The sign is behaviour before it is a lesion: startling during feeding, and gathering into small groups swimming through each other.

Withdrawal: None

Bụng, ruộtPhân sống ở hậu mônGan yếu theo

QT-06

Internal parasites and undigested faeces

Deworm on a schedule rather than waiting for symptoms. It is the cheapest prevention in the whole crop.

Withdrawal: 4 weeks

Product toolkit

Than Vuong products for Grow-out pangasius

Frequently Asked Questions

Which medicine for pangasius bacillary necrosis?

Bacillary necrosis from Edwardsiella ictaluri — treat with FLOR-MAX (florfenicol, low resistance) per dose, with HERB GUARD for liver recovery and reduced feeding during treatment. Observe full withdrawal before harvest.

What FCR is good for pangasius?

Target FCR ~1.5–1.7. A rising FCR usually means weak liver, poor gut absorption or bad environment — protect the liver (HERB GUARD, MAX LIVER), stabilize the gut (PRO GUT) and treat the environment.

How to handle toxic gas in high-density pangasius ponds?

Apply SOILMAX New + MAX 4000 regularly to decompose the bottom and convert NH3/NO2; use YUCCA C or NITROBAC to absorb NH3 when high; increase water exchange and oxygen, especially late-crop.

How to treat parasites on pangasius?

Gill flukes, Trichodina, monogeneans → use AQUA PRAZI, combine with water disinfection by WORK 80 or POWER GLUTA, then re-seed probiotics.

Need Grow-out pangasius farming advice?

Than Vuong technical team — free protocol consultation for your pond/cage, 24h response.

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