Fish aquarium water monitoring

I would like to monitor the water quality of a fish aquarium to make sure the fish stays alive:

  1. What do I need to monitor (oxygen level...) ?
  2. Which (low cost) sensor can do the job ?

Hello johnnule
Take a view to get some ideas:,will%20indicate%20the%20signal%20through%20buzzer%20and%20LED.

Have a nice day and enjoy coding in C++.

Oxygen (if you have a water pump to circulate the water) should not be an issue for the fish. Overfeeding is usually what kills them :slight_smile:

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