Coldwater Fish (Generally don't need a heater):
* Goldfish: These are classic beginner fish, but remember they can grow quite large. They need a spacious tank (at least 20 gallons for a single goldfish, more for multiple).
* Common/Comet Goldfish: These varieties are less prone to fin rot and are generally hardy.
* Fantail Goldfish: These are known for their beautiful, flowing fins but can be delicate.
* Shubunkin Goldfish: These come in beautiful color patterns and are known for their hardiness.
* White Cloud Mountain Minnows: Small, peaceful fish that are great for beginners.
* Rosy Barbs: Active and schooling fish, they prefer cooler temperatures.
* Zebra Danios: These are popular for their bright stripes and activity levels.
Important Considerations:
* Tank Size: Even though these fish don't need a heater, they still need adequate space. Research the mature size of each fish you choose and provide a suitable tank size.
* Water Quality: Regular water changes are essential for all fish. Use a water conditioner to remove chlorine and chloramine.
* Diet: Feed your fish a variety of foods, including flakes, pellets, and live or frozen foods.
* Aquascaping: Create an interesting environment for your fish with plants, rocks, and driftwood.
Note: It's always best to do thorough research on each specific fish species before bringing them home. Every species has its own unique needs, and proper care will ensure their longevity and well-being.
Remember, fish are living creatures and require responsibility. Make sure you're committed to providing them with the best care before bringing any fish home.