Tank setup and equipmentComplete guide
What Size Tank Does a Betta Fish Need? The Honest Answer
Bettas need at least 5 gallons, not a bowl. Here is what tank size actually changes, what welfare guidance says, and why the cup was never the plan.
What this section covers
- Tank size and shape
- Heaters and temperature control
- Filtration and flow
- Lighting and substrate
- Live plants for betta tanks
- Decor, lids and fin safety
- Complete builds by budget
7 of 7 written. New guides three times a week.
Complete guides
Tank setup and equipmentComplete guide
How to Set Up a Betta Fish Tank: Step by Step
A complete betta tank setup in order: what to buy, how to assemble it, how to cycle it, and when the fish actually goes in. Nothing skipped.
Tank setup and equipmentComplete guide
Do Betta Fish Need a Heater? Temperature Explained
Yes, and here is why room temperature is not enough. Target range, how to size a heater, and why stability matters more than the exact number.
Tank setup and equipmentComplete guide
Do Betta Fish Need a Filter? What the Evidence Says
Yes, and the reason is bacteria rather than clean-looking water. Which filters suit bettas, how to soften the flow, and why sponge filters win.
Tank setup and equipmentComplete guide
Best Betta Tanks: What to Look For and What to Avoid
What actually makes a good betta tank, which kit features are worth paying for, and the shapes to avoid. Criteria rather than a ranked list.
More on tank setup
Silk vs Plastic Plants for a Betta: Which Actually Damages Fins?
Silk plants are the safer default for betta fins, but not every plastic plant is dangerous. Here is the actual edge test and when each one works.
A Complete Betta Setup Under $100
Everything a betta genuinely needs, with nothing decorative. What to buy, what to skip, and where spending less costs you more later.
How to Baffle a Filter That Is Too Strong for a Betta
Four ways to cut the outflow, from a free bottle baffle to a sponge over the outlet. How to tell the current is genuinely too strong.
Sponge Filter or Hang-on-Back for a Betta?
Sponge for most betta tanks, hang-on-back if you baffle it. What each one actually does, what it costs, and how they fail.
Why Bettas Jump, and the Decor That Damages Their Fins
Bettas jump and it kills them. Why a lid is not optional, plus the decor and plastic plants that shred long fins.
Betta Tank Lighting and Substrate: What to Choose
Bettas prefer dim, shaded water. How long to run a light, why sand beats coloured gravel, and what depth you actually need.
Live Plants for a Betta Tank: What Actually Works
Six plants that survive low light and no fertiliser, where to put them, and the two mistakes that kill new aquarium plants.
Five Gallon or Ten Gallon for a Betta? A Straight Comparison
Both work. The ten is easier to keep, cheaper to run than you expect, and more forgiving of mistakes. Here is the honest comparison.
Can a Betta Fish Live in a Bowl? The Straight Answer
Survive for a while, yes. Live well, no. What a bowl actually does to a betta, and what to do tonight if yours is in one.
