If you've kept bettas for any amount of time, you've heard at least one of these. These fish live in little puddles, they don't need a filter, and they're totally fine in just a small little vase. And somehow all these myths just seem to refuse to die.

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.

Description pick:

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.