---
title: "Water restoration for shrimp farmers | Alchemal"
url: "https://alchemal.com/aquaculture/who-we-serve/shrimp-farmers/"
description: "In a grow-out pond, survival and growth ride on the oxygen the water holds overnight. We hold it top to bottom and measure the record against a baseline."
source: "Alchemal — alchemal.com"
---
# Water restoration for shrimp farmers

A crash before dawn, a black bottom by mid-cycle, a feed bill that climbs while growth stalls. In grow-out the margin lives in the overnight oxygen, and one hot night can take a season's work. You want numbers, not adjectives, which suits us.

## The problems we see on your water

- [Morning die-offs: the pre-dawn oxygen crash Stock lost overnight, found at first light. See what causes the pre-dawn oxygen crash and how a continuous reserve prevents the next one.](https://alchemal.com/problems/morning-die-offs-grow-out-ponds/)
- [Low dissolved oxygen: the ceiling on stocking density Feeding harder for gains that don't come, with the pond closer to a crash each night. Oxygen is usually the ceiling. See how to read the headroom.](https://alchemal.com/problems/low-oxygen-stocking-density/)
- [Fish that eat but don't grow: feed, oxygen, and FCR Feed going in without the weight coming out. When oxygen is marginal, the stock converts poorly. See how steadier oxygen returns energy to growth.](https://alchemal.com/problems/feed-conversion-slow-growth/)
- [Living on paddlewheels: cost, coverage, and the outage risk Paddlewheels running long hours, more added every season, one outage from a bad night. See how a held reserve changes what the machines must carry.](https://alchemal.com/problems/paddlewheel-aeration-dependence/)
- [Black pond bottoms in shrimp culture: the anaerobic sediment A pond bottom gone black and sour, with soft-shelled shrimp and thin survival. See how oxygen to the sediment keeps the bottom aerobic.](https://alchemal.com/problems/black-pond-bottom-shrimp/)

## What Alchemal installs and takes responsibility for

Most of what goes wrong in a grow-out pond traces to the same place: the oxygen runs short, worst at the bottom and worst before dawn. Nanobubble oxygenation holds dissolved oxygen (the oxygen dissolved in the water) top to bottom and around the clock, including the bottom water where the overnight demand and the sulfide build. More of the stock survives the hot nights, growth holds through the dark hours, and the paddlewheels do less of the work.

We install the system, sized to your ponds at the assessment, and [Stewardship](https://alchemal.com/stewardship/) carries the measuring from there. The record is built on numbers you already watch: the overnight low in dissolved oxygen, hydrogen sulfide and the condition of the pond bottom, and feed conversion against a baseline taken before any commitment. The [N-Series](https://alchemal.com/technology/n-series/) unit is matched to the pond at the site assessment.

## What the published work shows

The mechanism has been measured against a conventional diffuser in a controlled shrimp trial.

2×

In a controlled shrimp trial, nanobubble aeration roughly doubled total harvest and productivity against a conventional diffuser aerator, and survival reached 95 percent.

[Rahmawati et al., *Aquaculture and Fisheries*, 2021](https://doi.org/10.1016/j.aaf.2020.03.005)

Pacific white shrimp (Penaeus vannamei) in 50 m² indoor raceway ponds over 81 days, nanobubble versus diffuser aeration. A controlled trial, not an Alchemal installation.

These findings describe nanobubble oxygenation as a mechanism, not an Alchemal unit. Our own installations publish their records as case files as they go in.

## Proof from shrimp farmers

The first installations for this audience are being instrumented now, and their case files publish when the record is worth reading. The [methodology](https://alchemal.com/technology/how-we-measure/) is already public: what we record, how we calibrate, and how we report what didn't move.

## From your first note to the assessment

1. You describe the water. A specialist reads it, replies in writing, and says whether an assessment makes sense.
2. Your water goes on the schedule. The first assessments and installations are being scheduled now; requests are answered in the order they arrive.
3. The assessment puts a baseline on paper: dissolved oxygen top to bottom, clarity, the condition of the sediment, and a plan with a prediction attached. If oxygenation isn't the right fix, the report says so.

## Questions shrimp farmers ask

**Will installing this interrupt a running cycle?**

No. The system installs at the pond as it stands and runs continuously. Stocking, feeding, and the paddlewheels all keep going, with nothing added to the water except oxygen.

**How do you size a system for my ponds?**

The assessment measures the overnight low in dissolved oxygen and the load the pond carries, then sizes the system to hold a reserve through the pre-dawn hours at your stocking. An undersized system fails, so we will not quote one to win on price.

**What does it cost to run against my paddlewheels?**

That is a number we measure rather than claim. The argument is transfer efficiency: more of the oxygen you pay for stays in the water, so a given reserve costs less energy to hold. Stewardship meters energy per kilogram produced against your baseline.

## Start with a conversation.

Describe the water and a specialist replies in writing, before any commitment. Your water, your numbers.

[Get a free assessment](https://alchemal.com/assessment/?water=shrimp-pond) [See the case-file format](https://alchemal.com/technology/how-we-measure/)