Setting up a tank without a heater? No worries
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🥶 These 27 fish thrive in cooler water and still bring the color, personality, and fun. From underrated nano species to legendary coldwater champs (and even an axolotl!), we’re ranking the absolute best for unheated setups.
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⬇️ Cold Water Fish List
01:06 Fish 27 to 22. TIER: Niche But Noteworthy
03:43 Fish 21 to 14. TIER: Solid Cold Water Champs
06:38 Fish 14 to 6. TIER: The Elite Cool Crew
09:45 Fish 5 to 1. TIER: The S-Tier Coldwater Legends
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Comments
15 responses to “27 Best Cold Water Fish for Your Aquarium (No Heater Needed!)”
Other then white clouds, Which of these will thrive in a heavily planted 1800 liter backyard pond zone 8?
I have a colony of 24+ white clouds in an outdoor stream/water garden I made. They climb mini fish ladders to explore new areas and spawn frequently, doubling the original number I purchased 4 years ago. They water is 80F in the summer, 16f frozen surface in the winter. Amazing fish.
this made me feel better about keeping a tank in a cooler room
White cloud minnows have been bulletproof for me, nice seeing them get some love
i’ve been running a no-heater tank for years and this list is way more accurate than most
do you find cold water fish less active compared to tropical, or just different behavior
I started heater-free by accident and never went back
anyone here actually running a tank year round without a heater? how stable has it been for you
has anyone mixed cold water fish with live plants successfully?
Hillstream Loaches are my favorites
love seeing practical fish instead of the usual tropical picks
this video explains why my old goldfish tank always did better in cooler temps
Axolotl is the best of all fish… What an ugly creature. In a cute way, but still ugly enough that I wouldn't want to see it in real life. 😀 Using Pokémon as a measure of visual value is also an interesting phenomenon. You should have added a turtle, a frog, a salamander, a crab, and a penguin to the list, and then removed all the fish from the top five.
Okey, at 05.58 you call the sunset variatus…….however the shown fish at this exact mark is something else and a Beauty! Do you know what kind of fish this one is! They are beautiful 😍 and not the kind you describe
Did we miss one? Which coldwater fish is your favorite? And if you want to buy us a cup of coffee please consider joining as a member, thanks! And you get access to these cool sharks among other perks: