Can Molly Live With Swordtail?
Molly and Swordtail are compatible. Temperature overlap 72–82°F. Both peaceful.
Conditions: Minimum 20 gallon tank.
Parameter Comparison
Tank Requirements for Molly + Swordtail
To keep Molly and Swordtail together, you need at minimum a 20 gallon tank. Molly should be kept in a school of 4+. Swordtail should be kept in a school of 3+. Provide adequate filtration, stable temperature with a heater, and hiding spots to reduce stress.
Species Profiles
Molly
Poecilia sphenops
Mollies are versatile livebearers that come in many varieties including black, dalmatian, balloon, and sailfin. They prefer hard, alkaline water and can even tolerate brackish conditions. They are active, personable fish that breed easily.
Full care guide →Swordtail
Xiphophorus hellerii
Swordtails are hardy, colorful livebearers named for the distinctive elongated lower tail fin (the 'sword') found on males. They come in many color varieties including red, pineapple, marigold, and tuxedo. Larger than guppies but just as easy to care for, swordtails are excellent community fish that prefer hard, alkaline water.
Full care guide →