Aquariums are cool but info is quite use-full to fix the biotope. This project is started to measure the aquaria's parameters
What: Are there any changes in the water temperature?
Why: Alerting when something goes wrong
Heatmap with multiple sensors:
What: Why: How: Using a cheap PH meter: Referal: https://en.wikipedia.org/wiki/Electrical_conductivity_meter
CO2 - Carbondioxide
Is the current stable, is the pump dead, etc?
Electrical conductivity meter