---
title: "Water restoration for hatcheries | Alchemal"
url: "https://alchemal.com/aquaculture/who-we-serve/hatcheries/"
description: "In a hatchery the value per animal is highest and a bad night the least forgivable. We hold dissolved oxygen steady through the sensitive stages."
source: "Alchemal — alchemal.com"
---
# Water restoration for hatcheries

In a hatchery the value per animal is highest and the tolerance for a bad night is lowest. Larvae and fingerlings feel a swing in oxygen before anything else does, and a few hours of low water can undo weeks of careful work.

## The problems we see on your water

- [Hatchery and raceway oxygen: the flow-through margin Dissolved oxygen falling pass to pass, the last raceway running short. See how efficient oxygen widens the flow-through margin.](https://alchemal.com/problems/hatchery-raceway-oxygen/)
- [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/)

## What Alchemal installs and takes responsibility for

A hatchery lives or dies on stability. The animals are small, the stocking is dense, and dissolved oxygen (the oxygen dissolved in the water) that dips for a few hours at night can cost survival that no daytime reading would predict. Nanobubble oxygenation holds oxygen steady and continuous through the water, so the sensitive stages are not riding a curve that falls every night.

We baseline the oxygen profile before sizing anything, install the system matched to your tanks or raceways, and [Stewardship](https://alchemal.com/stewardship/) logs dissolved oxygen continuously from there. The record is the profile itself, inflow to outflow and through the dark hours, measured against a baseline taken before any commitment. Where the real limit is flow or waste rather than oxygen, the assessment says so instead of selling you a system you do not need. The [N-Series](https://alchemal.com/technology/n-series/) unit is matched to the site at the assessment, and [what we measure and how](https://alchemal.com/technology/how-we-measure/) is published so the numbers you plan against are ones you can check.

## Proof from hatchery managers

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 hatchery managers ask

**Do you work with flow-through and tank systems?**

Yes. We baseline dissolved oxygen through the system, inflow to outflow and across the tanks, then size the system to hold it steady at the stocking you run. The measured profile, not a rule of thumb, sets what goes in.

**Is steady oxygen as important as high oxygen at early stages?**

Often more so. Early life stages are sensitive to swings, so a continuous supply that does not dip through the night matters as much as the peak reading. Because the effect is measurable, Stewardship logs it rather than leaving it to impression.

**How disruptive is installation to a running hatchery?**

The system installs alongside what you run and holds a base supply from the start. There is no shutdown to plan around, and nothing is added to the water except oxygen.

## 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=hatchery) [See the case-file format](https://alchemal.com/technology/how-we-measure/)