How big is your tank? dimensions? If its a 5gallon tank(which it should be!!! please do not put them in small containers or those Betta tanks LFS sell) then a small internal filter like a Fluval U1 or Hailea BT200 would provide filtration and its motor would provide some heatA filter really brings out the best colours of your fish and prevents fin rot, ammonia burns from scarring your betta's beautiful fins
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Anyway...heater not importantYou live in singapore...it's never cool here^^









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A filter really brings out the best colours of your fish and prevents fin rot, ammonia burns from scarring your betta's beautiful fins

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