Hi, all : ) I read all of the stickies, and I may have missed this... I know everyone's different, but I'd like to hear from others where they prefer to keep their nitrates. Both my tanks are fully cycled, I just have to decide how often to do water changes. I've read that anything below 40 is okay, some people say under 20, and I've even read articles doing my own research that say to keep them under 10. I have freshwater goldfish tanks. I've been changing the water weekly, even though the nitrates have never risen above about 15 in a week's time. I don't really mind it, but if I'm changing too frequently it would be nice to know it so I can save on conditioner and salt. What would you all recommend? Thanks!