AquariumHQ

AquariumHQ treats a tank as a connected system. Its records for fish, invertebrates and plants sit beside water chemistry, equipment concepts, husbandry problems and compatibility relationships. The site reports its coverage, identifies its Scottish operator, lists sources and licensing, and explains how confidence and editorial welfare positions are displayed. A practical tools section includes dilution and other calculators; the water-change tool shows its formula, replacement-water concentration and the simplifying assumptions behind repeated changes.

The catalog openly describes itself as partial, so absence should never be read as evidence that a combination is safe. Husbandry ranges drawn from several sources can still hide population differences, acclimation history and individual behavior. Its troubleshooting material is educational and explicitly does not replace an aquatic veterinarian. The strongest use is to follow connections and inspect the cited basis for a claim, then verify a sensitive decision elsewhere. This is more transparent than an unsourced care card, but transparency does not remove uncertainty from living systems.