![DaToo 30 Watt Small Aquarium Heater Mini Betta Flat Fish Tank Heater for 3 Gallon 5 Gallon : Amazon.ca: Pet Supplies DaToo 30 Watt Small Aquarium Heater Mini Betta Flat Fish Tank Heater for 3 Gallon 5 Gallon : Amazon.ca: Pet Supplies](https://m.media-amazon.com/images/I/61eodQ-Ha5L.jpg)
DaToo 30 Watt Small Aquarium Heater Mini Betta Flat Fish Tank Heater for 3 Gallon 5 Gallon : Amazon.ca: Pet Supplies
![Amazon.com: Aqueon Small Aquarium Fish Tank Submersible Mini Flat Heater Up to 3 Gallon Aquariums, 7.5 Watts : Pet Supplies Amazon.com: Aqueon Small Aquarium Fish Tank Submersible Mini Flat Heater Up to 3 Gallon Aquariums, 7.5 Watts : Pet Supplies](https://m.media-amazon.com/images/I/81wKri7aU3L.jpg)
Amazon.com: Aqueon Small Aquarium Fish Tank Submersible Mini Flat Heater Up to 3 Gallon Aquariums, 7.5 Watts : Pet Supplies
![What to put in a 3 gal round? It's got an under gravel filter and I have a small heater for it as well. Not thinking betta fish although it's an option. What to put in a 3 gal round? It's got an under gravel filter and I have a small heater for it as well. Not thinking betta fish although it's an option.](https://preview.redd.it/0xxx835ab3v21.jpg?auto=webp&s=79f101f7a71d64d813f12cf8c54509df3754ea2b)
What to put in a 3 gal round? It's got an under gravel filter and I have a small heater for it as well. Not thinking betta fish although it's an option.
![Betta Fish Tank, 3 Gallon Glass Aquarium, 3 in 1 Fish Tank with Filter and Light, Desktop Small Fish Tank for Betta Fish, Guppies, Goldfish : Amazon.ca: Pet Supplies Betta Fish Tank, 3 Gallon Glass Aquarium, 3 in 1 Fish Tank with Filter and Light, Desktop Small Fish Tank for Betta Fish, Guppies, Goldfish : Amazon.ca: Pet Supplies](https://images-na.ssl-images-amazon.com/images/I/81Ia9vZ4urL._AC_UL600_SR600,600_.jpg)
Betta Fish Tank, 3 Gallon Glass Aquarium, 3 in 1 Fish Tank with Filter and Light, Desktop Small Fish Tank for Betta Fish, Guppies, Goldfish : Amazon.ca: Pet Supplies
![Betta Fish Tank Heater, 25W Mini Aquarium Heaters with 2 Artificial Plants 1 Stick-on Thermometer Strip Energy-efficient Water Warmer Temperature Controller Smart Thermostat for 3-5 Gallon Tank Black Betta Fish Tank Heater, 25W Mini Aquarium Heaters with 2 Artificial Plants 1 Stick-on Thermometer Strip Energy-efficient Water Warmer Temperature Controller Smart Thermostat for 3-5 Gallon Tank Black](https://www.gosupps.com/media/catalog/product/cache/25/image/1500x/040ec09b1e35df139433887a97daa66f/5/1/51VdEp3BDYL.jpg)
Betta Fish Tank Heater, 25W Mini Aquarium Heaters with 2 Artificial Plants 1 Stick-on Thermometer Strip Energy-efficient Water Warmer Temperature Controller Smart Thermostat for 3-5 Gallon Tank Black
![This is my 3 gallon UNS 3N tank (regret not getting a 5 gallon), it houses my betta Noir and nerite snail Zébre. Currently has no heater but a Fluval P10 is This is my 3 gallon UNS 3N tank (regret not getting a 5 gallon), it houses my betta Noir and nerite snail Zébre. Currently has no heater but a Fluval P10 is](https://i.redd.it/xaaloh5mnm161.jpg)
This is my 3 gallon UNS 3N tank (regret not getting a 5 gallon), it houses my betta Noir and nerite snail Zébre. Currently has no heater but a Fluval P10 is
![DaToo 25W Mini Aquarium Heater Betta Small Fish Tank Heater Submersible 3 to 5 Gallon, 1 Yr Warranty : Amazon.ca: Pet Supplies DaToo 25W Mini Aquarium Heater Betta Small Fish Tank Heater Submersible 3 to 5 Gallon, 1 Yr Warranty : Amazon.ca: Pet Supplies](https://m.media-amazon.com/images/I/61Xd9SF6DDL._AC_UF1000,1000_QL80_.jpg)