Trout raceway dissolved oxygen monitoring round — Hagerman Valley, ID.

This library's catfish DO standard covers a warm-water species; trout are a cold-water species with a much higher oxygen demand, so a genuinely distinct standard is needed rather than reusing the catfish thresholds. Hagerman Valley, ID -- centered on Buhl, often called the trout capital of the world -- raises roughly 70% of all trout produced in the United States, fed by the Snake River Plain Aquifer's naturally oxygenated, constant-temperature (about 58F) spring water emerging at Thousand Springs, which is exactly why this valley became the center of US commercial trout farming. The University of Idaho Extension maintains an active aquaculture program for this county. A dated DO round with a calibrated meter turns the valley's natural advantage into a verified daily number rather than an assumption.

Where

On-site / raceway-side, Hagerman Valley, ID (rainbow trout operations) · Open the map

Pay

$175 proposed

This packet is not funded yet, so this figure is a proposed price and not money waiting in escrow. If a buyer funds it, approved proof settles that price onchain. If nobody funds it, approved proof earns provable credit toward the work instead of cash — recorded, and readable any time at vealth.net/labor/credit/(your wallet). You see which before you claim, never after.

Proof

A dated DO reading (calibrated meter, both raceway inflow and outflow points) per raceway/pond, compared against the 7-9 mg/L target, 5 mg/L stress, and 3 mg/L lethal-risk bands, with any visible fish distress or huddling at inflow points treated as an immediate emergency regardless of the reading, and trend kept against the prior round

This is exactly what gets it approved. Nothing settles without it.

Level

skilled

Open until

2026-09-02

Posted by

0x034F…6c89

The creator wallet. Its signature is what approves proof and settles the wage.

How this work is done

A documented method, so this packet comes out the same whoever does it.

Bring

• A calibrated dissolved-oxygen meter/probe (calibration checked before each round)
• Raceway/pond access reaching both the inflow and outflow of each unit
• A recording sheet or app with raceway ID, inflow/outflow DO readings, time, and prior-round fields

Steps

1. 1. Calibrate the DO meter per the manufacturer's instructions before starting the round.
2. 2. Measure DO at the INFLOW of each raceway/pond (freshest water, typically highest DO).
3. 3. Measure DO at the OUTFLOW of each raceway/pond (after fish have consumed oxygen moving through), since this is the lowest and most consequential reading.
4. 4. Record both readings per raceway, with the outflow reading treated as the pond's governing DO value.
5. 5. Observe fish behavior, especially at inflow points -- abnormal crowding/huddling near fresh incoming water, or surfacing/gasping anywhere in the raceway, signals fish are actively seeking oxygen and is treated as an IMMEDIATE emergency regardless of the meter reading.
6. 6. Compare the outflow reading against the 7-9 mg/L target band, the <5 mg/L stress threshold, and the <3 mg/L lethal-risk threshold.
7. 7. If DO is below 5 mg/L, or any fish distress is observed, respond immediately: increase water flow rate, add supplemental aeration, or reduce stocking density in that raceway.
8. 8. If DO is approaching 3 mg/L, treat as an active emergency requiring the most aggressive available intervention without delay.
9. 9. Record the full round (all raceways, inflow/outflow readings, time, any intervention taken, any distress observed) and route any recurring or unexplained DO decline to a state aquaculture extension specialist or aquatic-animal-health authority.

What counts as done

• Dissolved oxygen (mg/L) measured with a calibrated meter at both the inflow and outflow of each raceway/pond, since DO drops as water moves through a raceway carrying fish
• Reading compared against the 7-9 mg/L target band, the <5 mg/L stress threshold, and the <3 mg/L lethal-risk threshold
• Visible fish distress (surfacing/gasping, or abnormal crowding at fresh-water inflow points) noted and treated as an immediate emergency independent of the numeric reading
• Comparison against the prior round's readings recorded as a trend, never a guarantee of the next reading

Proof is measured against these, not judged by taste.