Monster Fish Keeper - Goldfish are another easy choice of fish because, unlike most tropical fish, they don't require heaters. Yupangco warns, though, that once you start a goldfish tank, you're limiting
![Jainsons Pet Products Sobo Glass Aquarium Heater Fully Submersible Aquarium Heater/Adjustable Temperature (20°-32°C) Fish Tank Heater Fish Aquarium Tank Waterproof Heaters (75W) : Amazon.in: Pet Supplies Jainsons Pet Products Sobo Glass Aquarium Heater Fully Submersible Aquarium Heater/Adjustable Temperature (20°-32°C) Fish Tank Heater Fish Aquarium Tank Waterproof Heaters (75W) : Amazon.in: Pet Supplies](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/616gPdv2t9L._AC_UF1000,1000_QL80_.jpg)
Jainsons Pet Products Sobo Glass Aquarium Heater Fully Submersible Aquarium Heater/Adjustable Temperature (20°-32°C) Fish Tank Heater Fish Aquarium Tank Waterproof Heaters (75W) : Amazon.in: Pet Supplies
![On IG. 5 goldfish in a 10g, no filter, heater or airstone.... Caption says "sleepy heads". : r/shittyaquariums On IG. 5 goldfish in a 10g, no filter, heater or airstone.... Caption says "sleepy heads". : r/shittyaquariums](https://i.redd.it/venuma3avc711.jpg)