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The key thing really is the flow rate - not too strong or you'll stress out your fish. When I had my little 30L tank (before I upgraded), I used an Aquael Fan Mini and turned the flow way down, it was perfect for my small fish. A basic internal filter is more than enough if you do your water changes regularly, like 30% every week or two, and what really matters is avoiding those overpowered filters that turn your tank into a tornado.
For 30L I'd say a small internal filter is more than enough, like an Aquael or a basic Tetra. You gotta get something with a flow that's not too aggressive or your fish will get exhausted. After that it really depends on what you're gonna put in it but no point overcomplicating things with crazy equipment for a tank that size
I agree that an internal filter is the simplest solution for a 30L! After that it really depends on what you put in it - if it's just small peaceful fish like guppys or neons, basic stuff works fine, but if you want a more stocked tank you might want to aim for something with a bit more flow 😊 The important thing is just that it doesn't create crazy current that stresses your little guys, so check when you buy that it's compatible with your tank size!
What fish are you planning to put in it? Personally I've had a small internal filter for years and it works really well, but watch out for one thing that nobody mentioned - you really gotta check the water circulation! I've seen too many people get a filter with decent flow on paper but it creates dead zones in the corners, and that's a pain for water quality! I'd suggest getting a model with a little diffuser or an adjustable outlet, it makes all the difference for avoiding waste buildup, you'd have way less annoying cleaning sessions!
bricoleur84 asker
I'm hesitating between neon tetras and corydoras, just some little peaceful fish! 🐠
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