Welcome
Betta Fish Care Starts Here.
Bettas are one of the most misunderstood fish in the hobby. They get sold in cups, kept in bowls, and fed whatever’s cheapest on the shelf — and then people wonder why they only live a couple months.
KnowBetta exists to change that, with clear, research-backed betta fish care guides and honest answers to the questions you’re actually Googling.
New to Bettas? Start Here
Setting up your first betta tank? Work through these four guides in order. They’ll take you from “thinking about it” to a fully cycled tank that’s actually ready for a fish.
- Is a Betta Right for Me?: what bettas cost, what they need, and what you’re signing up for.
- What Size Tank Do Bettas Need?: why 5 gallons is the real minimum, and what the research says about anything smaller.
- How to Set Up a Betta Tank: every piece of equipment you need and how to put it all together.
- How to Cycle Your Betta Tank: the nitrogen cycle, explained for humans rather than chemists.
Everyday Betta Care
Once the tank is running, betta care comes down to two routines: feeding right and keeping the water clean. Neither takes more than a few minutes a week, you just have to do them consistently.
- What to Feed a Betta Fish: the best pellets, frozen foods, and the common feeding mistakes that shorten lives.
- Tank Cleaning & Water Changes: how often to change water, how much to swap, and how to clean without crashing your cycle.
Betta Health, Stress & Lifespan
Most betta diseases don’t come out of nowhere. Stress shows up first, and stress almost always traces back to the water. Learn what a stressed betta looks like, how to treat the three most common diseases, and how much time good care actually buys you.
- Signs of a Stressed Betta: faded color, clamped fins, glass surfing, and how to fix what’s causing them.
- Ich, Fin Rot, and Velvet: how to spot and treat each one, symptom by symptom.
- How Long Do Betta Fish Live?: the real lifespan numbers, and the care that adds years.
Tank Mates & Community Tanks
Yes, bettas can have tank mates… sometimes. Whether it works depends on your betta’s temperament and, more than anything else, your tank size.
- Betta Fish Tank Mates: the best companions, the species to avoid, and how to judge compatibility.
- Betta Tank Mates by Tank Size: realistic stocking plans for 5, 10, 20, and 29-gallon community tanks.
Recent Articles
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How Long Do Betta Fish Live? (And How to Get More Years With Yours)
Most pet bettas die within a year, but they don’t have to. Here’s how long betta fish really live and the care that adds years to their lifespan.
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Betta Tank Mates by Tank Size: What You Can Really Keep in a 5, 10, 20, or 29-Gallon
How many tank mates can a betta really have? Realistic, research-grounded stocking plans for 5, 10, 20, and 29-gallon betta community tanks.
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Signs of a Stressed Betta (and How to Fix It)
Faded color, clamped fins, glass surfing? Here’s how to spot a stressed betta, what’s causing it, and how to fix it before disease sets in.
About the Author
I’m Annie, the creator of KnowBetta. I’ve been keeping freshwater fish most of my life and bettas have always been my favorite. KnowBetta is the fish-keeping resource I wanted to see in the world: clear, well-researched, and written by someone who genuinely wants to help.