I go thru a gallon or so every 24 hours with mine.
I am doing a "constant water change" or "automatic water change" system to my new 210g I am building(got the stand framework done finally) but the auto water change seems to be the best way, it refills the tank on its own and changes roughly 50% every week. 58% on my tank to be exact.
That's not a planted tank. That's a jungle with glass around it- MFDROOKIE Circa 2011