I'd just like to say that it's refreshing to find an aquarium site that isn't full of fish nazis . At least from what I've seen so far . In some of the other sites I've browsed , if Tankgirl said that it is OK to have nitrates between 20-40 in an established tank , she would have been savagedly attacked & mocked . Personally , I keep them under 20 . It's also great to be in a forum where you won't be verbally abused for keeping 25 inches of neon tetras in a well planted & maintained 20 gallon tank . The way some people rant about this in the other forums , it's a wonder that they don't buy a 20 000 gallon indoor swimming pool & stock it with 10 neon tetras . Keep up the good work .