Heating & Cooling7 min
Best Betta Fish Heaters for 2.5 to 10 Gallon Tanks (2026)
Tetra's 50 W HT holds a 5 to 10 gallon betta tank at 78°F with no dial to get wrong. Here are the adjustable, nano and shatterproof alternatives, sized to your tank.
Topic
Betta
4 guides.
Guides
Tanks & Stands8 min
Best Betta Fish Tanks (2026): 5 Gallon Kits and What to Add
Marineland's Portrait 5 is the betta tank we would buy: 5 gallons, a hidden filter, a glass canopy and a hinged LED. Here are the alternatives and the heater each one still needs.
Filtration & Air7 min
Best Sponge Filters for Aquariums: Fry, Shrimp, Bettas and Big Tanks
Hikari's Bacto-Surge is the sponge filter we would start with. Here is how to size one, which air pump runs it, and when a double sponge or a tiny nano sponge is the better buy.
Heating & Cooling5 min
Betta Fish Water Temperature: The Right Range and How to Hold It
Keep a betta between 76 and 81°F, ideally around 78. Here is where that number comes from, why small tanks swing, and how to hold the range in winter and summer.