The Waterline aims to make aquarium information clear enough to use and careful enough to trust. We distinguish general explanations from advice that depends on a particular tank, species, or set of conditions.
Accuracy and clarity
We check claims against suitable source material and make the limits of a general explanation clear. Aquarium conditions vary with the tank, its inhabitants, and its maintenance. Readers should not treat a single reading, symptom, or equipment choice as a complete diagnosis of a tank.
Independence and commercial material
Editorial decisions are made separately from commercial relationships. Sponsored material and partner content are labelled clearly so readers can distinguish them from independent editorial coverage. A commercial relationship does not guarantee favorable editorial treatment.
Corrections
If you spot a factual error or a passage that needs clearer wording, send the article title and the point in question through the Contact page. We review correction requests and update material when warranted, making significant changes clear to readers.
Images and illustrations
Some illustrations may be AI-generated. Such images are illustrative, not records of a real aquarium, fish, or test result, and they should not be used to identify a species or assess tank conditions.