![]() That’s why you can keep them in an aquarium without a heater. They are easy to care for and can survive under harsh conditions. An aquarium heater is as big as a filter which means that we need to consider only those types of fish that do not need a heater and filter at the same time.Ĭold-water fish can live in cold water at 68 degrees Fahrenheit. An aquarium heater plays a critical part in some fish species’ life. The filter isn’t the only essential equipment to keep a fish. By doing daily water changes, you can keep some specific types of them in your fishbowl, and there is no need for filters. Small fish require less space and less water and reduce waste. Small FishĪnother thing to consider is the size of the fish. ![]() They can adapt easily and maintain a wide range of water parameters, making them the best fish for your fish tank that doesn’t have a filter. They have high disease resistance, low maintenance requirements, and an incredible sense of temperature changes – meaning you never need to worry about your aquarium environment! ![]() Hardy fish are those types of fish that can live under tough conditions. The best fish that don’t need filters are hardy fish. We included three types of fish, and that’s for a reason: Hardy Fish There are numerous fish species out there that don’t need a water filter (for a short time). A few types of them are more survival than others when it comes to water quality. The filter is critical and essential equipment for your fish to survive. The good news is that many fish species can do okay for a short period in fish tanks or fishbowls without a filter. These toxins can lead to respiratory problems. ![]() If your tank doesn’t have any filtration system, your fish will be breathing in ammonia and nitrate,s which are toxic compounds that come directly from the fish’s waste! Please never keep your fish without a filter.įish can’t breathe air, so they use their gills to get oxygen from the water.
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