Monitoring system
Water parameters
Water paremeters for (freshwater) aquarium are numerous and more or less important.
It is nevertheless a good idea, even in some cases a must, to monitor some of them: temperature (with alarm when too cold or too warm..), pH (to avoid acidosis), etc.
What is currently used on My tanks:
AquaMedic pH monitor, real time pH readings, not online
AquaMedic mV monitor, real time redox potential readings, not online
InkBird thermostat WLAN ITC-306A, real time temperature (double sensor) readings, alarm out of range, online
Tuya multiparameter monitor, real time temperature, pH, ORP, EC, TDS readings, alarm out of range, online.
Aquarium automation
At any time, from any where, simply check or even control what is running or not. Power consumption can also be interesting.
Currently My tanks are run by Mi Home, Xiaomi brand, equivalent to Aqara. See more info on miaquarium.com ;-)
Webcam
Fishes are the best indication all good or there is an issue. To see them can help remote diagnostic or even remote assistant when somebody can help.
In conjunction with aquarium automation, a webcam located in the sump will help to diagnose and remote fix any issue.
Currently My tanks are setup 2 webcams YI Dome U Pro