Why Is My Aquarium Water Brown? Tannins, Waste or the Water Source

Moss on driftwood in an aquarium

Brown aquarium water is often tannins leaching from driftwood, leaves and botanicals, which Aqueon says aren’t dangerous to fish. It can also come from decaying food, plants or waste, so test ammonia and nitrite first.

Why Is My Aquarium Water Yellowish: Quick Fixes & Causes

Why Is My Aquarium Water Yellowish

Learn why is my aquarium water yellowish, how to clear yellow water fast, and easy prevention tips to keep your tank healthy.