Here's a breakdown:
* Bristlenose Pleco: These peaceful algae eaters can reach up to 6 inches, so a 35-gallon tank is suitable for one.
* Black Mollies: These livebearers are generally peaceful, reaching 3-4 inches.
* Betta: While bettas are known for their beauty, they can be aggressive towards other fish, especially those with similar finnage. A 35-gallon tank provides enough space for a betta to establish its territory and potentially tolerate the other fish.
* Malaysian Snails: These are peaceful and beneficial for cleaning algae. Two snails will be fine in a 35-gallon tank.
Key Considerations:
* Compatibility: Bettas can be fin-nippers, especially towards fish with flowing fins. While black mollies are generally hardy, they could get nipped if the betta is aggressive.
* Tank Mates: You might need to closely observe how they interact initially. If the betta starts attacking the mollies, you may need to consider separating them.
* Water Parameters: Ensure the tank is properly cycled and maintains appropriate water parameters for all species.
* Aquascaping: Provide plenty of hiding places for the betta and pleco, and open space for the mollies.
Recommendations:
* Start with a smaller group: Consider starting with just the pleco, mollies, and snails to allow them to establish themselves.
* Observe behavior: Monitor how the betta interacts with the other fish. If aggression occurs, you may need to separate them or find a different home for the betta.
* Provide hiding spots: A 35-gallon tank allows for good space for hiding places, which is especially important for the betta and pleco.
Ultimately, the success of this combination depends on the individual personalities of the fish.
Remember: It's important to research each species' needs and ensure you can provide the appropriate environment for their well-being. Always prioritize their health and happiness!