Oxygenate your lake,
automatically.

The intelligent solar aeration system that monitors dissolved oxygen in your lake 24/7 — and responds before your fish suffer.

Designed in rural France · 100% solar

Lake calculator → How it works Get a quote
500W
Solar power
24/7
DO monitoring
17h+
Night autonomy
WiFi
Live dashboard
€0
Electricity cost
The problem

Every summer, your fish suffer in silence.

During hot August nights, dissolved oxygen in your lake can fall below critical levels. Your fish come to the surface to breathe — and losses can occur without warning.

  • 🌡️
    Summer thermocline traps cold water at the bottom

    Warm surface water no longer mixes with cold bottom water — which becomes oxygen-depleted.

  • 💀
    The anoxic bottom produces toxic gases

    H₂S, methane — dangerous gases that accumulate in the silt and threaten your fish.

  • ⚡
    Remote sites are impossible to connect to mains power

    Most fish lakes in rural France are far from any electrical supply.

1.8mg/L DOCritical level — 3am, August
⚠ Below 3 mg/L: your fish are in danger
Understanding the problem

The thermocline — your fish's invisible enemy.

In summer your lake divides into distinct layers that no longer mix. Explore the tabs below to understand why this is dangerous — and how AirLac fixes it.

Lake cross-section showing thermal stratification 25°C — warm thermocline 12°C — cold 8–10 mg/L O₂ sharp temp drop 0–2 mg/L O₂ H₂S · CH₄ epilimnion thermocline hypolimnion
Epilimnion (surface)
Warm, well-mixed by wind. Photosynthesis keeps DO high — 8–12 mg/L. Where fish spend most of their time.
Thermocline (boundary)
Temperature drops 4–8°C in just 30–50cm. Acts as an invisible lid — blocks oxygen from reaching the bottom.
Hypolimnion (bottom)
Cold, dark, oxygen-free. Bacteria produce toxic H₂S and methane. Fish avoid this zone entirely.
Why it matters
On hot August nights DO can crash from 9 mg/L at sunset to below 2 mg/L by 3am. The thermocline prevents any natural recovery.
Move the slider to see how DO levels change through a typical hot summer day.
Time 14:00
Lake DO levels at selected time 8.4 mg/L DO — surface 1.2 mg/L DO — bottom — thermocline — 14:00
DO levels right now
Surface
—
Mid-water
—
Bottom
—
Afternoon
Photosynthesis is active — algae and plants are producing oxygen.
AirLac pump
Standby — DO above threshold
How AirLac breaks the thermocline THERMOCLINE BROKEN DO rising cold water drawn up air hose UNIT
Breaking the thermocline
The AirLac diffuser sits below the thermocline. Rising micro-bubbles drag cold bottom water upward, physically breaking the boundary layer.
Oxygen throughout the water column
Once the thermocline is broken, oxygenated surface water mixes down — eliminating the dead zone at the bottom.
Toxic gas removal
The mixing also releases H₂S and methane from the bottom sediment safely into the atmosphere before they accumulate.
DO sensor placement
The AirLac probe floats mid-water — right at the critical boundary. It detects the earliest signs and triggers the pump before DO crashes.
Our solution

Solar aeration that thinks for you.

Our system continuously monitors dissolved oxygen and temperature in your lake. It automatically triggers aeration when needed — even without sun, even at night.

01
☀️

500W solar panel

Charges the 24V 100Ah LiFePO4 battery during the day — 17+ hours of night autonomy.

02
🔬

Submerged RS485 probe

Measures dissolved oxygen, saturation and temperature every 10 seconds from the lake bed.

03
🧠

M5Stack CoreS3 analyses

Automatically adjusts trigger threshold by water temperature. 6-band thermal compensation.

04
💨

Hiblow XP80 activates

58W, 80 L/min. Air delivered via weighted hose to EPDM diffuser on the lake bed.

05
📱

WiFi dashboard

DO, temperature, pump status — in real time from your phone. No app required.

Key advantages

Designed for fish lake owners.

🌡️

Automatic temperature compensation

The trigger threshold automatically adjusts based on water temperature — from −0.8 mg/L in winter to +1.2 mg/L during summer heatwaves.

🔋

17 hours of night autonomy

The 24V 100Ah LiFePO4 battery powers the system through the longest August nights — when risk is highest.

📶

WiFi monitoring without an app

Simply type the IP address in your browser. The dashboard refreshes every 10 seconds.

🐟

Gentle on silt and fish

The micro-bubble diffuser on a raised frame preserves the productive silt where your fish feed.

⚡

Fully solar, zero electricity bill

500W of panels, no grid connection. Quick installation at the most remote sites.

🔔

Instant critical level alarm

If DO falls below 3 mg/L despite aeration, the screen turns red and the visual alarm activates immediately.

Dashboard

Your lake in the palm of your hand.

From any phone on your WiFi network, view all your lake's data in real time. No app — just a browser.

  • ✓Dissolved oxygen in mg/L and saturation percentage
  • ✓Water temperature and compensated threshold in real time
  • ✓Compressor status and duty cycle
  • ✓6-minute history graph
192.168.1.47 — AirLac Controller
6.84mg/L DO
dissolved oxygen
Compressor standby
18.4°C
Temperature
74.3%
Saturation
5.3
ON threshold
Compressor ready — DO optimal
Remote monitoring

Your lake in the palm of your hand — from anywhere.

Connect a 4G router at the lakeside and monitor your DO levels, temperature and pump status in real time from anywhere in the world.

  • ✓Live DO, temperature and saturation
  • ✓Pump status and duty cycle history
  • ✓Overnight 12-hour DO graph
  • ✓Live solar input and battery level
  • ✓Alert and event history
What you need
A 4G router (~€40) at the lakeside. No app to install — just open a browser on your phone.
9:41
WiFi●●●
AIRLAC SOLAIRE
Dave's Lake
live
Dissolved Oxygen
6.8 mg/L
Healthy
Temp
18.4°C
Pump
Standby
Overnight DO
Solar
312W
charging
Battery
84%
Live History Alerts Settings
System diagram

How it works in practice.

A complete view of the installation — from the solar panel on the bank to the diffuser on the lake bed.

solar energy 500W solar panel Solar aerator unit pump · battery · controller Weighted air hose DO & temp probe Diffuser Oxygen bubbles AirLac Solaire — system overview Solar-powered dissolved oxygen aeration for fish lakes
DO reference

Understanding dissolved oxygen in your lake.

Adjust the parameters below to see recommended DO levels for your specific lake.

Stocking density

▾

Lake depth

▾

Time of day

▾

Controller ON threshold

—

Controller OFF threshold

—

Danger alarm level

—

Depth correction

—

Max DO saturation Recommended target Minimum acceptable Danger threshold
Temp (°C) Max saturation Recommended target Minimum acceptable Danger below Status
How to read this chart: Fish can survive below 2 mg/L but growth, feeding and reproduction suffer significantly. The recommended target accounts for stocking density, depth, and time of day.
Lake calculator

Does your lake need aeration?

Enter your lake's details to get a personalised recommendation and tailored quote.

Your lake

Lake diameter 60 m
10m200m
Average depth 2.5 m
0.5m6m
Summer temperature 22 °C
15°C35°C
Number of fish 25–50 fish
<25
Very light
25–50
Light
50–100
Moderate
100–200
Heavy
200+
Very heavy
Surrounding shade Some shade
OpenSome shadeHeavy shade

System recommendation

Overnight DO risk level

LowMediumHighCritical
—
Lake volume (m³)
—
Units recommended
—
Night autonomy
—
DO trigger (mg/L)
    Request a quote for this lake →
    Technical specifications

    Numbers that reassure.

    Every component is selected from European suppliers for its outdoor reliability.

    500W
    Solar panel
    Monocrystalline · ~24V
    100Ah
    24V LiFePO4 battery
    3000+ cycles · cold-resistant
    58W
    Pump consumption
    Hiblow XP80 · 230V AC
    80 L/m
    Air flow rate
    At 147 mbar · max depth 3.6m
    17h+
    Night autonomy
    Without sun, full battery
    10s
    Measurement frequency
    Modbus-RTU · optical probe
    5 mg/L
    Base activation threshold
    Auto-compensated by temperature
    IP68
    DO probe rating
    316 stainless · fluorescence
    AirLac solar aerator by the lake
    Our story

    Born in the field, designed for the field.

    Phil a solar engineer, assisted Michelle and David in supplying full off-grid solar to their fishing lodge in the Charente region. After many conversations, and after observing the reality and issues of fish lake owners in the region, that the idea of AirLacSolaire was born. They put their combined knowledge of Fish lakes and Solar together to create a fully automatic DO aeration module running on solar power.

    Phil brings solar energy expertise. David brings decades of Fish lake experience and more recently a Fish lake owner.

    The Mark 2 prototype is currently being built (June 2026) with our first client — a fish lake owner 20km from us.

    🇫🇷 Charente, France ☀️ Solar expertise 🐟 Fish lake owners 🇬🇧 EN · 🇫🇷 FR
    Contact

    Let's talk about your lake.

    Send us your lake's dimensions — we'll prepare a custom quote within 48 hours.

    📍

    Location

    Nouvelle-Aquitaine, France

    🌍

    Languages

    Français · English · Español

    ⏱️

    Response time

    Quote within 48h

    Your data is never shared. Response within 48h.