• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

Homemade Circuit Projects

Get free circuit help 24/7

  • 1000+ Circuits
  • Privacy Policy
  • About Us
  • Contact
  • Disclaimer
  • Videos – Circuit Test Results
You are here: Home / Decorative Lighting (Diwali, Christmas) / Fish Aquarium Oxygen Generator Circuit

Fish Aquarium Oxygen Generator Circuit

Last Updated on October 13, 2019 by Swagatam 14 Comments

In this article we discuss how to make a simple fish aquarium oxygen generator circuit using the concept of electrolysis of water.

Generating Pure Oxygen

The production of oxygen through electrolysis can be expected to supply a pure and a bigger quantity of oxygen compared to the usual pumped air concept which injects only only a portion of oxygen in the aquarium, therefore using electrolysis procedure looks a more efficient than the pumped air option

Fish Aquarium Oxygen Generator Circuit

In one of my earlier artilces we learned how to generate oxygen and hydrogen gas through electrolysis in large volumes, here we employ the same principle for the generation of pure oxygen using mains rectified AC.

The complete operational set up can be witnessed in the above shown figure.

The right side section of the diagram shows a small tank filled with clean tap water, having a lid which is appropriately fabricated to hold a plastic bottle such that its neck can protrudes out, and having a small opening some distance away for allowing the unused hydrogen gas to escape.

Two wires can be seen entering the water container with one of the wires pushed inside the bottle from its bottom end and appropriately sealed with epoxy glue and the other wire loosely held just below the lid opening.

The wire entering the bottle end is tied up with an electrode which could be ideally of graphite (salvaged from an old dead  AAA cells) in order to prevent degradation due to oxidization, overtime

The wires can be seen attached with the output of a bridge rectifier, which is supplied with an input from the mains AC 220V or a 120V.

When mains is switched ON, the power enters the bridge rectifier and gets converted into a pulsating DC, this DC is introduced inside the water tank for initiating the required electrolysis.

The potential at positive end electrode of the wire generates O, or pure oxygen, while the potential at the negative wire electrode breaks H+H atoms from water generating hydrogen which escapes through the lid opening into the atmosphere.

The oxygen gas is forced to bubble inside the water enclosed inside the bottle and it emanates through the tube into the aquarium where it bubbles back from bottom to the surface enriching the water with pure oxygen and making sure that the marine life inside the aquarium gets the best of the experience in terms of breathing and oxygen absorption.

Please note that in the discussed concept the water alone is forced to break into its constituent parts, absolutely NO external catalyst in the form acid or salt should be added in the electrolysis tank, which might otherwise cause the generation of poisonous gasses instead of oxygen.

Making the Bottle Oxygen Collector

The bottle which acts as the intermediate oxygen collector can be easily built using any ordinary empty cold drink bottle or a mineral water bottle.

As demonstrated in the figure below, the wire end with the electrode is inserted from the bottom corner of the bottle and sealed with epoxy glue or putty.

Next, many small holes are punched near the bottom end of the bottle so that water is able to enter and fill the bottle and enable the process of electrolysis inside it.

Further on, a plastic flexible tube is inserted through the lid or the cork of the bottle and glued with epoxy, the other end of the tube is immersed in the aquarium jar for allowing the oxygen to pass into it for initiating the required fish aquarium oxygen generation.

After this the bottle is pushed in the tank so that water fills in and hlds the bottle erect in the tank. The wires are then appropriately attached with the bridge rectifier source enclosed inside a plastic box, with a mains cord terminating out from the input of the bridge.

That's it! Once the above procedures are finished, it's just about plugging and switching ON the mains, and watching the the oxygen bubbling out inside the fish aquarium, making the lives of the fishes merrier.

Warning: The explained electrolysis set up for the fish aquarium generator circuit is very dangerous due to the involvement of AC mains in the electrolysis tank. Extreme caution and safety must be exercised while building and testing the proposed units.




Previous: Simple 20 watt Amplifier
Next: Raspberry Pi Explained

About Swagatam

I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. I am also the founder of the website: https://www.homemade-circuits.com/, where I love sharing my innovative circuit ideas and tutorials.
If you have any circuit related query, you may interact through comments, I'll be most happy to help!

You'll also like:

  • 1.  Subwoofer Music Level Indicator Circuit
  • 2.  Diwali, Christmas 220V Lamp Chaser Circuit
  • 3.  Xenon Strobe Light Control Circuit
  • 4.  Aquarium Fish Feeder Timer Controller Circuit
  • 5.  Switching OFF Lights in a Periodic Sequence
  • 6.  Arduino Random RGB Light Generator Circuit

Please Subscribe (Only if you are Genuinely Interested in our Newsletters)


 

Reader Interactions

Comments

    Your Comments are too Valuable! But please see that they are related to the above article, and are not off-topic! Cancel reply

    Your email address will not be published. Required fields are marked *

  1. Search Related Posts for Commenting

  2. dodong says

    I wonder how much electricity power is being consumed by this project?

    Reply
  3. Saeed Abu says

    Will the Acurium water shock by this morning operation? If I use DC adapter then that mechanism will work? How times I have to refills small tank water?

    Reply
    • Swagatam says

      Aquarium water has no contact with the electrolysis process or the AC mains so the question of shock does not arise…

      low DC will not produce much gas

      Reply
  4. Unknown says

    If we inhale the hydrogen gas coming out from the tank than it will be dangerous to our health

    Reply
    • Swagatam says

      hydrogen is lighter than air, so it will never stay inside the room….

      Reply
  5. Satish Jadhav says

    Sir, your circuit diagram is very economical and nice. AC is converted in to Dc by using Bridge Rectifier but what is the specification of Bridge Rectifier and how much it creates DC Volts ? Electrolysis means separating Oxygen & Hydrogen from each other and pure Oxygen to supply to Fish Tank. Sir, I think and it I am not wrong this technique is used De-Toxing Cum Foot-Spa machine where AC is converted in 24 Volts DC by a Transformer used in the machine. I would like you valuable opinion in this regards. Satish, praneelpune@gmail.com

    Reply
    • Swagatam says

      Thanks Satish,

      The bridge can be made using 1N4007 diodes as explained here:

      https://homemade-circuits.com/2012/09/how-to-generate-pure-oxygen-and.html

      Foot spa machine is a scam and is only to fool the consumer….the electrolysis is used for artificially dispersing chemicals in water which give an illusion of foot releasing dirt and getting detoxified.

      Reply
  6. ochin chukwuma says

    How do I feed the fish since the aquarum is closed completely or would the fish only survive with oxygen alone here.

    Reply
  7. Mihajlo Petkovic says

    Hydrogen MUST go outside so it doesn't explode inside.

    Reply
    • Swagatam says

      yes the small aperture on the lid is specifically for allowing the H2 to escape.

      Reply
  8. Sharoj Al Hasan says

    Sir Can You Provide Me A Simple Buzzer Circuit. when Get Power It Will Beep 10 second thn Get off . When The Power Come Again Thn Start For 10 second.
    i want to use It For My DC IPS. when Main Power 12 Volt Get This Circuit It will Beep the Buzzer thn stoped For This Season. when the power Source Off The Circuit will Reset. and when the Power Come again then the Circuit Will Work.

    Reply
    • Swagatam says

      Sharoj,

      you can use the following cirucit:

      https://homemade-circuits.com/2013/02/make-this-simple-delay-on-circuit.html

      replace T2 with an NPN transistor such as 2n2222, remove R3 and replace it with a link.

      connect the emitter of the 2N2222 to ground and connect the buzzer between its collector and the positive rail.

      for 10 sec you can try reducing R2 to some lower value

      Reply
  9. Sharoj Al Hasan says

    Sir Can You Please Provide Me 3V Relay Module Circuit. Please Sir

    Reply
    • Swagatam says

      you can refer this article:

      https://homemade-circuits.com/2012/01/how-to-make-relay-driver-stage-in.html

      Reply


  10. COMMENT BOX IS MOVED AT THE TOP


Primary Sidebar

Electronic Projects Categories

  • 3-Phase Power (15)
  • 324 IC Circuits (19)
  • 4017 IC Circuits (51)
  • 4060 IC Circuits (25)
  • 555 IC Circuits (92)
  • 741 IC Circuits (18)
  • Amplifiers (49)
  • Arduino Engineering Projects (82)
  • Audio Projects (83)
  • Battery Chargers (75)
  • Car and Motorcycle (87)
  • Datasheets (44)
  • Decorative Lighting (Diwali, Christmas) (31)
  • DIY LED Projects (81)
  • Electronic Components (96)
  • Electronic Devices and Circuit Theory (34)
  • Electronics Tutorial (99)
  • Fish Aquarium (5)
  • Free Energy (34)
  • Games (2)
  • GSM Projects (9)
  • Health Related (17)
  • Heater Controllers (23)
  • Home Electrical Circuits (98)
  • Incubator Related (6)
  • Industrial Electronics (25)
  • Infrared (IR) (39)
  • Inverter Circuits (94)
  • Laser Projects (10)
  • LM317/LM338 (21)
  • LM3915 IC (24)
  • Meters and Testers (52)
  • Mini Projects (152)
  • Motor Controller (64)
  • MPPT (7)
  • Oscillator Circuits (12)
  • PIR (Passive Infrared) (8)
  • Power Electronics (32)
  • Power Supply Circuits (64)
  • Radio Circuits (9)
  • Remote Control (46)
  • Security and Alarm (55)
  • Sensors and Detectors (115)
  • SG3525 IC (4)
  • Simple Circuits (72)
  • SMPS (30)
  • Solar Controllers (60)
  • Timer and Delay Relay (51)
  • TL494 IC (5)
  • Transformerless Power Supply (8)
  • Transmitter Circuits (36)
  • Ultrasonic Projects (12)
  • Water Level Controller (45)

Follow Homemade Circuits

Facebook
Twitter
YouTube
Instagram
My Facebook-Page
Quora

Feeds

Post RSS
Comment RSS

Circuit Calculators

  • AWG to Millimeter Converter
  • Battery Back up Time Calculator
  • Capacitance Reactance Calculator
  • IC 555 Astable Calculator
  • IC 555 Monostable Calculator
  • Inductance Calculator
  • LC Resonance Calculator
  • LM317, LM338, LM396 Calculator
  • Ohm’s Law Calculator
  • Phase Angle Phase Shift Calculator
  • Power Factor (PF) Calculator
  • Reactance Calculator
  • Small Signal Transistor(BJT) and Diode Quick Datasheet
  • Transistor Astable Calculator
  • Transistor base Resistor Calculator
  • Voltage Divider Calculator
  • Wire Current Calculator
  • Zener Diode Calculator

© 2021 · Swagatam Innovations

We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.Ok