Managing an aquarium is both an art and a science. It requires constant attention to water temperature, filtration, feeding routines, and lighting to ensure the health and well-being of aquatic life. However, for many aquarium owners—whether hobbyists or professionals—daily manual maintenance becomes time-consuming and error-prone.

To solve these challenges and make aquarium management smarter, we’ve developed an ESP32-based IoT Aquarium Tank Management System. This system brings automation, remote control, and customization to your fingertips by using MOSFET driver modules to control key components like the water pump, heater, LED lighting, and automatic fish feeder (based upon servo or stepper motor).

At the heart of this system is the powerful ESP32 microcontroller, which features built-in Wi-Fi and Bluetooth, allowing seamless communication with a smartphone via the Blynk IoT platform or a custom mobile app. With a simple tap on the screen, users can turn devices on or off, change lighting colors, activate the feeder, or set schedules—no matter where they are in the world.

The system is also modular and scalable, meaning more components can be added over time based on user needs. Whether it’s a temperature sensor to automate heater control, a pH sensor for water quality monitoring, or even a camera for live video streaming, the possibilities are vast. The system can be adapted for both freshwater and saltwater tanks, and for single or multi-tank setups.

This smart aquarium controller is not only suitable for tech-savvy aquarium keepers but also for beginners who want to simplify the care routine. It minimizes the chances of overfeeding, underheating, or forgetting scheduled maintenance, thereby reducing stress for both fish and owners.

Whether you’re managing a small home aquarium, a fish breeding tank, or a public display, this system brings convenience, reliability, and peace of mind. And for those who want a unique user experience, we also offer custom mobile app development services tailored to individual branding and feature requirements.

In short, this project bridges the gap between technology and aquarium care, making it smarter, more efficient, and accessible to everyone.

Components Used in Aquarium System Control Project:

1. ESP32 Wi-Fi + Bluetooth Board
   • Acts as the main controller and communicates with the IoT app.
2. MOSFET Driver Modules (IRF520 or similar)
   • Used to safely switch high-power devices like pumps, heaters, and lighting.
3. Submersible Water Pump
   • Circulates water to ensure proper oxygen and filtration.
4. Aquarium Heater
   • Maintains the water temperature at optimal levels.
5. RGB LED Light Strips or Bulbs
   • Adds aesthetic value; allows scheduling of sunrise/sunset or mood lighting.
6. Servo Motor
   • Dispenses food at predefined times.
7. DS18B20 Waterproof Temperature Sensor(Optional)
   • Monitors water temperature and automates heater control.
8. Real-Time Clock (RTC) Module(Optional)
   • Maintains accurate time for scheduled actions (e.g., feeding, lighting).
9. Blynk IoT Platform (or Custom App)
   • Provides a user-friendly mobile dashboard to control and monitor the system.
10. 5V Power Supply / Adapter

• Powers the high-current devices via MOSFETs.
• Select Power Supply as per Components Requirements.

Working of IoT Aquarium System Control with ESP32:

The ESP32 is programmed to control each device using digital outputs via MOSFET modules.

The Blynk IoT app or a custom smartphone app connects to the ESP32 over the internet, allowing remote control.

Users can:

• Turn the pump, heater, or lights ON/OFF manually or based on a schedule.
• Change LED colors through sliders or presets.
• Trigger the Servo Motor for fish feeder automatically at mealtimes.

Optional sensors can be added to automate components (e.g., turn off heater if temperature exceeds the set value).

All status updates and control feedback are visible live on the app.

Smartphone Control of IoT Aquarium System:

Using Blynk IoT, users can:

• Control devices with buttons or sliders.
• View current system status (e.g., water temperature).
• Set schedules or timers for each component.
• Get push notifications for critical alerts (e.g., high temperature).

App Interface Example:

• Button: Pump ON/OFF
• Button: Heater ON/OFF
• RGB Controller: LED Color
• Scheduler: Feeding Time
• Display: Temperature Sensor Readings
• Alert: High/Low Temperature Warnings

Custom App Option for IoT Aquarium System:

We also provide custom-designed mobile apps for clients who require:

• Brand-specific UI/UX
• Additional controls (multi-tank support)
• Offline control via Bluetooth
• Integration with camera feeds or advanced analytics

Circuit Diagram of IoT Aquarium System with ESP32:

Code for IoT Aquarium System:

// ==== Blynk Credentials ====
#define BLYNK_TEMPLATE_ID "YourTemplateID"
#define BLYNK_TEMPLATE_NAME "AquariumControl"
#define BLYNK_AUTH_TOKEN "YourAuthToken"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <Servo.h>

// ==== WiFi Credentials ====
char ssid[] = "YourWiFiSSID";
char pass[] = "YourWiFiPassword";

#include <Adafruit_NeoPixel.h>

// Pin to use to send signals to WS2812B
#define LED_PIN 15

// Number of WS2812B LEDs attached to the Arduino
#define LED_COUNT 12

// Setting up the NeoPixel library
Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);
// ==== Pins ====
#define PUMP_PIN     5
#define HEATER_PIN   4

#define SERVO_PIN    12
#define ONE_WIRE_BUS 13

// ==== Servo & Temp Sensor Setup ====
Servo feederServo;
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
float temperatureC;

// ==== Blynk Virtual Pins ====
#define VPIN_PUMP      V0
#define VPIN_HEATER    V1
#define VPIN_LED_COLOR V2
#define VPIN_FEED      V3
#define VPIN_TEMP      V4

BlynkTimer timer;

// ==== Setup ====
void setup() {
  Serial.begin(115200);

  pinMode(PUMP_PIN, OUTPUT);
  pinMode(HEATER_PIN, OUTPUT);
  pinMode(RED_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);
  pinMode(BLUE_PIN, OUTPUT);

  feederServo.attach(SERVO_PIN);
  sensors.begin();

 strip.begin();           // Initialize NeoPixel object
  strip.setBrightness(10); 
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);

  // Temperature update every 5 sec
  timer.setInterval(5000L, sendTemperature);
}

Future Upgradation of IoT Aquarium System:

This system is modular and scalable:

• Add pH sensors, water level detectors, TDS meters
• Control CO₂ regulators for planted tanks
• Integrate with Google Assistant or Alexa for voice commands
• Add camera module for live viewing of fish

Advantages of of IoT Aquarium System Project with ESP32:

• Full automation of aquarium management
• Saves time and prevents human error
• Remote access from anywhere in the world
• Prevents overfeeding, overheating, or neglect
• Easily customizable for any user or tank size

Applications of IoT Aquarium System:

• Home aquariums
• Fish breeding tanks
• Pet shops and aqua scaping studios
• Public aquarium displays
• Remote fish tank monitoring in offices or cafes

Need This Project?

If you need this Project with or without Modifications or Customization then you can contact us through WhatsApp. We can deliver you this Project in the Following Ways.

Project Code:
we can provide you Project Code along with Zoom Assistant, through Zoom meeting for Setup of this Project or any other Arduino Project of your need.

Fully Functional Project with Hardware/Components Shipment:
if you can not make this project yourself then you can use this option. We will assemble the Project and will ship it to your Doorstep with Safe Packaging.

Learn More about the services we offer.