TP-Link Smart Plug w/Energy Monitoring, No Hub Required, Wi-Fi, Control Your Devices from Anywhere,Works with Alexa and Google Assistant, Control Your Devices from Anywhere (HS110)
Lowest price so far based on https://au.camelcamelcamel.com/product/B017X72IES
HS100 also available at the same price: https://www.amazon.com.au/TP-Link-Required-Anywhere-Assistan…
Thanks - that would work. (Just have 30 tanks to do)