I do not know if it is designed to stay on 24 hours but I leave mine on 24/7 and have for a year. It is still going strong.
answered 11 months ago
1out of 1found this answer helpful.
Yep, I leave it on all the time, unless I'm doing a big clean up of my entire tank. When I'm cleaning my tank is the only time I disconnect (turn off) my heater.
answered 1 year, 10 months ago
0out of 0found this answer helpful.