It is a good idea to do other tank maintenance routinely, such as scraping or wiping down the inside of the glass to remove biofilm/algae, pruning plants, removing dead or algae infested leaves, etc. With my low light, DIY CO2 65 gallon tank, I do this weekly +/- a few days, and after I do that I do a roughly 50% water change, using a garden hose running out my patio door to a hose bib for filling and into 2-5 gallon buckets for the siphoned out water. I use that water to water my patio plants. This takes 30-45 minutes a week. I can't say I look forward to doing this every week, but it really isn't much work - when it gets cold and rainy it will be more difficult.