So just out of curiosity, if I have a relatively low amount of nitrates, and my nitrites and ammonia are 0, is there a point in doing water changes? Now I'm not advocating doing less water changes, but other than nitrate reduction, is there a point? The reason I'm asking, is I've noticed over the past few months that my nitrates grow really...really slow. I attribute this to having such a large amount of anacharis in my tank. Several studies have shown that anacharis is one of the top nitrate absorbing aquatic plants available. But if the majority of my nitrates are being absorbed by the anacharis, is there another point in doing a water change? One point that comes to mind is just to clean the bottom of the tank from old food and fish poo and general junk. But other than that...is there a point? Again, I'm not advocating reducing water changes or not doing them at all. Just curious.