This species is quite vibrant and will add a whole new visual dynamic to any aquarium they’re kept in. If you’re a fan of the color red, you’ll love this fish. Simply keep them with peaceful fish that are too big to be picked on! With that being said, they can show a little bit of aggression when put in the wrong situation (or with the wrong tank mates).
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As long as you take the time to understand their main care requirements and how to set up their habitat, you should be just fine. Paradise Fish have mesmerized aquarists for years with their bright colors and flowing tails (us included).Ĭaring for these fish is something that anyone can do. This is one of the most aesthetically-pleasing species on the list. As long as that’s not a problem, give them a shot! It’s worth noting that you’ll need a slight larger tank in order to keep them (a good portion of the fish we’ve covered so far are fine with small aquariums). With an ability to thrive in water temperatures as low as 50☏, the Dojo Loach should be at the top of your list for fish that don’t need heaters. They’re quite active and friendly, so they’re always up to something. In our opinion, this is one of the most enjoyable fish to watch. Their interesting pattern and colors make them a great choice for anyone looking to bring some color to their tank. The Celestial Pearl Danio is a gorgeous species that many aquarists love. It can be hard to spot them at times! Their bodies are very textured and they almost look like they’ve been rendered by a bunch of polygons. These fish have an extremely interesting look that makes them stand out (or blend in) compared to many other species. This makes them a great nano fish for small tanks as well. Part of what makes the Asian Stone Catfish so adorable is their tiny size. They’re hardy, peaceful, and very easy to care for. These little critters are one of our favorite freshwater catfish species to keep in cold tanks.
![marine aquarium 3 compatibility sittling marine aquarium 3 compatibility sittling](https://cf-s3.petcoach.co/uploads/noslidesarticleimages/13210i07FF2240954C42E5.png)
They don’t need anything in particular when it comes to their habitat as well, so you can plan around their tank mates. They can survive in water temperatures as low as 50☏ which means you can keep them in tanks without a heater (if it works with the rest of your setup). They can even be used as feeder fish if you so choose. These fish are very hardy and can thrive in a variety of different conditions. Rosy Red Minnows are one of our favorite species, and near the top of the list when it comes to cold water fish for your aquarium. Out of all the fish we recommend to our readers, this could be the species we suggest the most. You can put them in almost any tank, with almost any other species. One of the reasons these fish are so popular is their versatility. This is why they’re also called the Bushy Nose Pleco.
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On their head and nose area, they have a series of appendages that protrude in various directions. The Bristlenose Pleco has a very interesting look that can’t be ignored. This is one of the most popular species in the freshwater aquarium community as a whole, and they make great cold water fish. They will show some situational aggressiveness from time to time, but that’s not very common behavior. They’ll handle almost all living conditions with ease. Mosquito fish are extremely easy to care for and are quite hardy. This is why so many people consider them one of the best pond fish. These fish get their name from their aggressive consumption of insect larvae.
![marine aquarium 3 compatibility sittling marine aquarium 3 compatibility sittling](http://www.marinecompatibilityguide.com/image/rabbitfish/siganuspunctatus.jpg)
No matter what your preference is, we thought it would be foolish not to include them on our list. However, some aquarists like to keep them in tanks as well. This is a very neat species that is often kept in ponds. There are usually some species-specific details you need to be aware of, but nothing extreme.
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A lot of the time they don’t even need heaters!įancy goldfish will get along with many other species and don’t require a lot of effort to keep healthy. These fish are great for cold water aquariums since their natural temperature requirements are quite low (this can be as low as 50☏).