DIY aquarium heater controller

Building a DIY aquarium heater controller is easier than you might have thought. Certainly worth the $25!

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The king of DIY


What do you think?


Written by The king of DIY

Content AuthorYears Of Membership


  1. This is a good way to control, but a bit noisy with the relay clicking. I prefer to control using a solid state relay in place of the magnetic relay.

  2. An easy way to calibrate the prob is to put it into boiling water. As long as you’re not crazy above or below sea level, it will always be 100 degrees centigrade, or 212 degrees Fahrenheit

  3. The wiring colours are totally the opposite (bar the earth) across the pond ours are brown or red for live , blue or black for neutral and green/yellow for earth. You would have thought they would be similar atleast not opposite 😂 I wonder if the 3 phase are different or do you use Red,Yellow,Blue aswell

  4. Cool build and so easy to do, I'm going to make an extra one for my beer fridge! My only recommended mod is to put a 1/8" (mini) mono phone plug on the end of the sensor, and the female jack on the box to make it easy to run the sensor however you want then just plug it in at the box.

  5. Taking this great idea and using it to add the controller to my stand so I don't see or have a big box with the outlets inside my stand so I could plug my heaters and the display outside so I could control temperature

  6. Uh i need some help. So im using a powerpoint instead of receptacle and don't know where to attach the 'grey' wire to the 'highest point'. There is no 'highest point' or any other connections, can i just attach it to the earth?

  7. My dad & husband are electronic technicians I''ll just let them watch this and then tell them "Ok, this is what I want done" and like magic it would be done. That way I don't have to worry about electrocuting me or my fish

  8. Do they have a controller like this that is in Fahrenheit other than the itc-1000 (you must specify Fahrenheit and 110ac)? I'm pretty sure it's also possible to use poles 7 and 8 to control a cooler or fan etc.?

  9. Safety back up, I have used these for some time and they work great, but, I had a situation were the sensor probe failed(Pacus eat it) the controler saw very cold temps and kept the heaters on and cooked the fish. I now set the heaters to just a few degrees above my controller set point so if something fails they still will not over heat the water

  10. you can also calibrate the sensor with ice water. ice water will be 0 C (32F) with a tiny smidgen difference depending on hardness but im talking about literally 1/10 of a degree.

  11. How powerful are the heaters you are controlling? I am using a water heater element in my 900 gallon tank. I needed to add a relay between the controller and the heater element.

  12. A quick tip: if you buy a duplex receptacle cover matching the colour of your receptacles, you can screw it on over the front face of the acrylic and give it even more of a professional look(skipping the silicone step). You're probably talking about 50 or 60 cents for that cover. Also, I have my annotations turned off, so forgive me if it already appears, but please mention GFCI protection in a situation like this. Any time you're plugging anything close to your aquarium into an outlet, that outlet should be GFCI protected. Technically, that's a code rule in Canada(and probably the US too), and if your house burned down as a result, an insurance company might not help you out if it were violated. Could be that it was mentioned and it's escaped my mind, or that it appeared in an annotation, but regardless, consider it.

    And I'm fast becoming addicted to these videos, Joey. It's great to see some Canadian fish-related YouTube content, and these videos look great. Very professional.



I made a BIG mistake!

I’m setting up a SALTWATER aquarium!!