Here's a breakdown:
Snails that do NOT need a heater:
* Most common aquarium snails: These include snails like Mystery snails, Nerite snails, and Ramshorn snails. They can tolerate a wider range of temperatures, typically from 68-82°F (20-28°C).
* Cold-water snails: Some snail species, like the Bladder snail, are adapted to colder temperatures and can thrive in tanks without heaters.
Snails that DO need a heater:
* Tropical snails: Some snails, like the Apple snail, come from warmer regions and require a heater to maintain a temperature around 75-82°F (24-28°C).
* Sensitive species: Certain snail species might be more sensitive to temperature fluctuations and may benefit from a heater even if they are not technically "tropical" snails.
General guidelines:
* Consider the species: Research the specific snail species you are keeping to determine their temperature requirements.
* Tank temperature: If your tank temperature regularly drops below 68°F (20°C), a heater might be beneficial for most snail species.
* Comfort and well-being: A heater can create a more stable environment for your snails, ensuring they are comfortable and healthy.
Overall, while most common aquarium snails don't require a heater, it's always best to research the specific needs of your snails and ensure they are kept in a comfortable temperature range.