No, 82 is fine. 80 might be a little more preferable, but 72-74 is too cold for most tropical fish.
Goldfish like cooler temps but cichlids like it warmer.
Getting back into the hobby... restocking a 55 Gallon tank with peacock cichlids (currently housing 2 synodontis petricolas). Planning a complete overhaul of my 30 Gallon Oceanic Cube (currently housing a bristlenose pleco and a praecox rainbow).