
Why Your Aquarium Tank Water Is Yellow Or Brown (And How To Fix It)
Aquarium enthusiasts often pride themselves on maintaining crystal-clear water, so it can be concerning when the water turns yellow or brown. This discolouration can signify various issues within the tank ecosystem, but understanding the causes is the first step to restoring your aquarium’s health and clarity. Causes of Yellow or Brown Aquarium Water Tannins Leaching One of the most common causes of water discolouration is tannins. These organic compounds leach into the water from driftwood or other natural decorations. While tannins are not harmful to fish and can even create a more natural environment resembling the habitats of some species,