Aquaculture Water Quality Logger
Pond/tank logging for fish & shrimp — DO, pH, ammonia, temperature against culture-safe bands; dawn-DO trends, alerts and feed-day records.
Pond / tanks
Log a pond/tank reading
Field guide: Aquaculture Water Quality Logger
Fish die at dawn: dissolved oxygen bottoms out in the pre-sunrise hours after a night of respiration with no photosynthesis, which is why the dawn DO reading is the one that predicts mortality events — and why this logger treats it as the headline parameter (≥4–5 mg/L for most culture species; the bad mornings announce themselves days earlier in the trend). The supporting chemistry follows the toxicology: un-ionized ammonia NH₃ (the toxic fraction, ≤0.05 mg/L chronic screening), pH both for its own band and because it sets how much of your total ammonia IS un-ionized, and temperature driving both relationships.
Secchi depth makes greenwater pond management quantitative: 25–60 cm is the productive-bloom band — clearer means the bloom (your oxygen factory and shade) is thin; murkier means a dense bloom whose nighttime respiration will eat tomorrow's dawn DO. The classic crash sequence (bloom dies → DO collapses → ammonia spikes) is visible in these trends 24–48 hours ahead, which is exactly the aeration/water-exchange decision window.
Field tips
- Take the DO reading at first light, pond-side — by 9 a.m. photosynthesis has hidden the truth until tomorrow.
- A pH swing of more than ~1 unit between dawn and dusk means the bloom is too dense; tomorrow's dawn DO will pay for it.
- Test kits report TOTAL ammonia — the toxic NH₃ fraction depends on pH and temperature; log conditions and convert (high pH + heat = danger zone).
Records are stored only in this browser (localStorage) — export regularly. This tool aids field documentation; it does not replace your agency's official inspection procedures or engineering judgment.
Aquaculture Water Quality Logger — Pond/tank logging for fish & shrimp — DO, pH, ammonia, temperature against culture-safe bands; dawn-DO trends, alerts and feed-day records. Free, offline-first and GPS-aware: open it on any phone, log in seconds, and hand your GIS team clean GeoJSON.
About Aquaculture Water Quality Logger
Fish die at dawn: dissolved oxygen bottoms out in the pre-sunrise hours after a night of respiration with no photosynthesis, which is why the dawn DO reading is the one that predicts mortality events — and why this logger treats it as the headline parameter (≥4–5 mg/L for most culture species; the bad mornings announce themselves days earlier in the trend). The supporting chemistry follows the toxicology: un-ionized ammonia NH₃ (the toxic fraction, ≤0.05 mg/L chronic screening), pH both for its own band and because it sets how much of your total ammonia IS un-ionized, and temperature driving both relationships.
How to use Aquaculture Water Quality Logger
- 1Set up each monitoring site once with its location and GPS pin.
- 2Enter readings as you take them — limits for this medium are pre-configured from the cited standard.
- 3Exceedances are flagged instantly and the compliance rate updates as you log.
- 4Export the period's readings and exceedance report for your compliance file.
Why use Aquaculture Water Quality Logger?
- ✓100% free, no sign-up — built for crews, not per-seat licences
- ✓Offline-first: records save to your device instantly and survive dead zones
- ✓One-tap GPS tagging with accuracy capture on every record
- ✓Exports CSV for asset systems, GeoJSON for GIS, and print-ready reports
- ✓Checklist and guidance aligned with Boyd, C.E.
Frequently asked questions
Why is dawn the critical DO moment?+
All night, fish + plankton + sediment respire while photosynthesis sleeps — DO falls continuously until sunrise. A pond reading 8 mg/L at 3 p.m. can be at 2 by 5 a.m. with a heavy bloom. Dawn readings catch the true minimum; trending them shows the margin shrinking days before the morning the aerators lose the race.
What's the difference between total ammonia and NH₃?+
Kits measure total ammonia nitrogen (TAN) — the sum of toxic un-ionized NH₃ and relatively harmless ionized NH₄⁺. The split depends on pH and temperature: at pH 7/25°C about 0.6% of TAN is NH₃; at pH 9 it's ~25–40×. So 1 mg/L TAN is fine in an acidic pond and lethal in an alkaline afternoon — always read TAN with its pH.
What does Secchi depth manage in a pond?+
It's the bloom dipstick: a white/black disk visible to 25–60 cm marks a healthy phytoplankton density that feeds the food chain, shades weeds and produces daytime oxygen. <25 cm means a dense bloom (night DO risk, crash risk); >60 means thin water (weeds, low productivity, less buffering). Fertilize or exchange water against this number, not the calendar.
What's the emergency response to a DO crash?+
Aerate maximally (paddlewheels, sprays — anything moving water and air), stop feeding (digestion consumes oxygen), exchange water if available, and skip any planned harvest stress. Crashes follow bloom die-offs and cloudy stretches; the log's value is making them rare by showing the slide while it's still a management decision.
Embed Aquaculture Water Quality Logger on your website
Want Aquaculture Water Quality Loggeron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
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