Frayed fins with white edges usually mean fin rot. Here's what causes it, the signs to look for, and the treatments that actually work, plus how to keep it from coming back.

The starter kit makes it look simple, but the box cannot teach you the biology. Tank size, cycling, tap water, evaporation, live plants, maintenance, and algae: what to know before your first fish ever goes in the water.

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If the room feels comfortable to you, the water must be fine, right? Wrong. 7 reasons room temperature is a lie for tropical fish tanks, and the $2 fix that ends the guessing.

You’ve changed the water, cleaned the filter, and the tank is still cloudy. The culprit is usually good intentions. The 5 suspects behind cloudy aquarium water, and how to clear it for good.

You just bought a beautiful new betta fish. You drop a pellet into the water and nothing. The fish looks at it, spits it out, and swims away. If your betta is refusing to eat, you're probably panicking, assuming they're sick or about to die. But in 90% of cases, your fish isn't dying at all. They are just the victim of a hidden aquarium crime scene. And we have seven prime suspects to investigate. And the most common culprit is something you can't even see. The thermometer co