Yep. I do a 25% water change every few days, and a 50% once a week. After I plumbed that water drain and water mixer to refill, it is super easy to do. I have taken a few fish out and moved them too, so it's not that bad. I check the parameters each week, and the nitrates don't rise too much each week. Just before today's change, they were only at 20, so not too bad.