Water Changes When Nitrates consistently read zero?

[Delphinus]

Salt buckets work pretty good for that sort of thing though, and odds are you'll have a half dozen of those before long in this hobby anyhow.. I find that the size of system makes a big difference too. My big tanks get by with a 25% monthly w/c if need be. Any nano (well let's say 40g or under) that I've tried that on ends up as a mess. Whereas 10% weekly and they do great. And the big tanks do better on the same weekly schedule. So I think it stands to reason that perhaps even more frequent, but smaller (and thus more manageable) w/c's might even be that much better.