Dissolved oxygen is the No.1 limiting factor in pond farming — this page collects TAYKEE's key technical points and every in-depth article on DO sensing, safety lines and online monitoring.
Fish and shrimp respiration, night-time algae respiration and bottom-sludge decomposition consume oxygen around the clock, while aerators are the only way to add it. High DO means fast feeding and a low feed conversion ratio; low DO starts with subtle surfacing, escalates to piping at the edges, and ends in a crash — the whole chain can unfold within hours.
Oxygen production stops at sunset while consumption continues, so DO keeps falling until dawn. Experienced farmers patrol at night to spot surfacing, but surfacing is a late signal — by then the level is often below 2 mg/L. Continuous monitoring with threshold-triggered aeration turns night watch from luck into data.
| Species | Comfort | Warning | Danger |
|---|---|---|---|
| Four major Chinese carps | ≥5 mg/L | ≤3 mg/L | <2 mg/L |
| Tilapia | ≥5 | ≤3 | <1.5 |
| Crucian / common carp | ≥4 | ≤2.5 | <1 |
| Largemouth bass / mandarin fish | ≥5~6 | ≤3 | <2 |
| Yellow catfish | ≥5 | ≤3 | <2 |
| Pacific white shrimp | ≥5 | ≤3 | <2 |
| Crab / crayfish | ≥5 | ≤3 | <2 |
Usage: keep DO above the comfort line, trigger aeration and alarms at the warning line, and treat the danger line as the point where you are already losing money. Where shrimp or crab share the pond, guard 5 mg/L — not the tolerance of the hardiest species. These are industry reference ranges; verify against your own pond.
TAYKEE uses optical (fluorescence-based) DO sensors: no electrolyte, no frequent membrane changes, a 100% saturation-in-air calibration every 6 months (3 months for high-density farms), and an optical cap replaced every 1~2 years. The biggest enemy of long deployments is biofouling — algae and attached growth drift the readings, so the probe carries an automatic wiper to keep unattended readings honest.
Monitoring only pays off when it drives control: below the warning line the aerators start automatically; back in the comfort band they stop in stages. The automatic aeration page covers the control logic, VFD speed staging and offline fallback. Control logic runs on the pond-side controller, so aerators keep operating on thresholds even when 4G drops.
Tell us your pond count, aerator size and current monitoring method — we reply within one business day with a suggested configuration and budget estimate.
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