Tips on Live Bearer Aquarium Maintenance & Care
Since live bearing fish breed very easily the size of tank should also be considered when keeping these fish. The smaller guppies and platys can survive in a 10 gallon aquarium but will soon need more space when they start having babies. Mollies and swordtails should have a minimum of 20 gallons and will quickly need more space when the fry start to come. If there are plans of breeding them and raising fry then doubling the size of the tanks just mentioned would be a good idea.
Since live bearing fish are warm water fish a good aquarium heater will be needed to keep the water temperature in the desired range of these fish. Good filtration is also needed to ensure that the water is kept clean and circulated in the tank. External power filters or undergravel filters are both adequate for live bearing fish. Even with a good filter it is important to maintain the water quality of the tank by doing regular partial water changes.