NUTRIRHODO
Biomass nutrient for photosynthetic bacteriaOne bag of NUTRI RHODO plus one 20-litre can of photosynthetic-bacteria starter, sun-incubated for about 7 days, gives 200 litres of Rhodo culture for your ponds — fewer cans to buy, lower crop costs.
- 20 → 200 L
- 1 bag + 1 starter can of 20 litres
- ≈ 7 days
- sun incubation to full colour
- ≥ 50%
- Protein (yeast extract)
- 2 – 4 L
- culture / 1,000 m³ of water
- Form
- Powder
- Pack
- 480 g bag
- Standard
- TCCS 24:2020/TV
- Code
- 01023858
Watch Duy Trần culture Rhodo step by step
- NUTRI RHODO — biomass nutrient for photosynthetic bacteria · 1:40The full 20-to-200-litre process in 1 minute 40 seconds.
- Secrets of growing photosynthetic-bacteria biomass · 6:51Each step explained: why not to use pond water, how to choose the starter.
- More on the Hành trình nuôi tôm – Duy Trần channel ↗
Photosynthetic bacteria help the pond, but buying cans all crop adds up
- 1
Work in dark, low-oxygen zones
They need little light and help break down organic matter and take up NH₃ and H₂S near the pond bottom.
- 2
Do not last long in the pond
The population fades, so they must be added regularly — many cans per crop.
- 3
Costs climb
Buying finished cans all the time pushes crop costs up considerably.
- 4
1 can becomes 10
One bag of NUTRI RHODO turns a 20-litre starter can into 200 litres after about 7 days in the sun.
Everything for one 200-litre batch
- Alcohol60 – 90% alcohol to rinse tools90% works best. This is the trick that keeps batches from failing.
- ≥ 200 LDrumA drum of about 250 litres lets you stir without spilling.
- 10 LPlastic bucketFor dissolving the nutrient before it goes into the drum.
- 180 LClean fresh waterWell water without alum or drinking water. Never salt water, never pond water.
- 20 LPhotosynthetic-bacteria starter canDeep red, fresh (made within 1 month). Thần Vương's: RODO BACTO, 20-litre can. View RODO BACTO →
- 1 bagNUTRI RHODO 480 gYeast-extract nutrient, enough for one 20-litre starter can.
- 10 bags20-litre bags or cansKeep shrimp-fry bags (do not slit them) and wash well, or use clean cans. Plus rubber bands.
- 1Clean stirring stickRinse it with alcohol like the other tools.
Follow the order, stir for the full time
Drum, bucket, jug, stick, bags or cans — anything that touches the culture must be rinsed thoroughly with 60 – 90% alcohol (90% is best). This is the number-one cause of failed batches: contaminated tools make the culture turn black instead of red.
Use clean fresh water only (well water without alum, drinking water). Never salt water, never pond water.
- 0
Rinse every tool with alcohol
Key trickDrum, bucket, stick, bags or cans — rinse them all with 60 – 90% alcohol. Many batches fail because this is skipped: contaminated tools make the culture turn black instead of red.
- 1
Pour 170 litres of clean water into the drum
170 LClean fresh water: well water without alum or drinking water. Never salt water or pond water — wild bacteria in pond water eat all the nutrient and the batch will not grow.
- 2
Dissolve NUTRI RHODO in 10 litres of water
≈ 10 minFill the bucket with 10 litres of clean water, add the whole bag of NUTRI RHODO and stir until dissolved.
- 3
Pour the bucket into the drum
1 – 2 minStir it into the 170 litres of water.
- 4
Add the 20-litre starter can
≈ 20 minStir until fully mixed — about 200 litres in total.
- 5
Fill bags or cans and seal
10 × 20 LTie the bag necks tight with rubber bands. Thin bags laid flat catch more sun.
Run a 20-litre test before the real batch
First time, or with a new water source or a new starter can: make a 20-litre test at exactly the same ratio as the 200-litre batch (divide by 10), with drinking water. If it turns red in about 7 days, go ahead with the real batch without risking a whole starter can.
Use clean fresh water only (well water without alum, drinking water). Never salt water, never pond water.
| Real batch 200 L | Test batch 20 L | |
|---|---|---|
| Water | 170 L clean water + 10 L for dissolving | 17 L drinking water + 1 L for dissolving |
| NUTRI RHODO | 1 bag of 480 g | 48 g (weighed, about 1/10 bag) |
| RODO BACTO starter | 1 can of 20 L | 2 L |
| Container | 10 bags of 20 L | 1 bag of 20 L or 1 plastic can |
- 1Rinse ALL tools with alcohol — the most important step20-litre can or bucket, measuring jug, stick, bag — rinse thoroughly with 60 – 90% alcohol. Miss one and the batch can get contaminated and turn black.
- 2Dissolve 48 g of NUTRI RHODO in 1 litre of drinking waterStir until fully dissolved.
- 3Pour into 17 litres of drinking waterNever salt water or pond water. Stir well.
- 4Add 2 litres of starterShake the starter can before pouring, add and stir well.
- 5Fill 1 bag, seal, put in the sunWatch the colour as for the real batch.
Seal and zip the rest of the NUTRI RHODO bag right away. Close the opened starter can tightly and use it soon.
The colour tells you if the batch is good
- Day 0Just baggedThe mix is still pale.
- Day 3 – 4Colour startsTurning pink to light red.
- Around day 7Full colour, readyEven deep red in the whole bag.
- Day 7 – 10Darker red with little sunIn low-sun seasons it can take up to 10 days.
Place the bags in full sun. The more surface exposed, the faster the colour develops; the sunny season works best. Colours shown are illustrative.
Batch not right: causes and fixes
| What you see | Usual cause | Fix |
|---|---|---|
| Turns black | Contaminated tools | Rinse the drum, bucket, stick and bags with 60 – 90% alcohol before starting. |
| No colour after 7 – 10 days | Old or pale starter, or not enough sun | Use a fresh starter (within 1 month) with deep colour; place bags in full sun. |
| No growth despite good sun | Pond water, salt water or water with alum | Use well water without alum or drinking water. |
| Slow, uneven colour | Thick bags, stacked, little sun | Use thin bags laid flat, never stacked. |
Using the finished Rhodo culture
Culture dosage as shown in the channel's video.- Finished Rhodo culture — routine use2 – 4 litres / 1,000 m³ of waterEvery 3 – 4 days, spread evenly over the pond
- Per the registered label — added to feed1 – 2 g / kg of feedDuring the crop
Adjust the dose to the actual pond condition, stocking density and shrimp health. Seal and zip the NUTRI RHODO bag right after use if not finished.
Quality specification and registration
Quality specification
| Protein (min) | 50% |
| Composition | Protein (yeast extract) |
Registration
| Form | Powder |
| Pack | 480 g bag |
| Standard | TCCS 24:2020/TV |
| Code | 01023858 |
| Declared by | Than Vuong Co., Ltd. |
Source: Thần Vương product data and code 01023858 on the Directorate of Fisheries lookup.
StorageStorage
Storage
- Where
- Dry, cool and well ventilated, away from direct sunlight. Keep out of reach of children.
- Opened bag
- Seal and zip the bag right after use if not finished.
Suggested starter
RODO BACTO — photosynthetic bacteria Rhodobacter, Rhodopseudomonas sp., 20-litre can.
View RODO BACTO →FAQFrequently asked questions
- What is NUTRI RHODO used for?
- It is a nutrient (yeast protein) for growing photosynthetic-bacteria biomass: 1 bag plus a 20-litre starter can gives about 200 litres after roughly 7 days in the sun. Per the registered label it can also be added to feed at 1 – 2 g/kg.
- Can I use pond water or salt water?
- No. Pond water is full of wild bacteria that eat all the nutrient, so the batch will not grow; salt water is not suitable either. Use well water without alum or drinking water; use drinking water for the 20-litre test.
- How long until it is ready?
- Colour usually starts on day 3 – 4 and reaches deep red around day 7. With little sun it can take up to 10 days.
- Why did my batch turn black?
- It is contaminated, usually because the tools were not sterilised. Do not use it; next time rinse the drum, bucket, stick and bags with 60 – 90% alcohol.
- How do I use the finished culture?
- 2 – 4 litres per 1,000 m³ of water, every 3 – 4 days, spread evenly over the pond.
- How do I choose the starter?
- A 20-litre can of photosynthetic bacteria, deep red and fresh (within 1 month). Thần Vương offers RODO BACTO, 20-litre can.
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