Stuff Needed to Set Up an Aquarium for Molly Fish

Mollies, fish of the genus Poecilia, are fixtures as pets in aquariums everywhere. These tropical fish are popular not only because they're inexpensive but also because they're robust. Black mollies in particular are prevalent in aquariums. These mollies generally work well in community tanks.

  1. Size of the Tank

    • Tank size is always a crucial consideration in setting up a proper aquarium for any fish, molly or not. Some types of mollies are as wee as 2 to 3 inches long, while others are somewhat sizable -- think 5 inches in length. Smaller mollies typically succeed in tanks that can accommodate no less than 20 gallons. Bigger mollies need ones that can handle at least 45 gallons.

    The Right Water

    • The right type of water is an absolute must for establishing a healthy molly aquarium. As far as alkalinity goes, mollies typically flourish in water that is harder. The correct temperature is also imperative. Mollies blossom in temperatures between 72 and 82 degrees Fahrenheit. Not all mollies are exactly the same, and some need refreshing of their water more often than others. Sailfin mollies are one such example, as water conditions easily affect them. Mollies flourish when a little bit of salt is placed into their water -- perhaps a single teaspoon for every 1 or 2 gallons of water.

    Other Suitable Tank Additions

    • A comfortable molly living environment calls for lots of live plants, as they serve as cozy retreats and hiding spots for these fish. Mollies also enjoy munching on plants. Also make sure that your aquarium is equipped with sufficiently open spaces for swimming purposes. Rocks make beneficial additions, too.

    With Other Fish

    • Mollies across the board tend to be harmonious, serene and relaxed fish. In community tanks, they need to share living spaces with other fish of similarly mild and pleasant dispositions. Fierce fish are a no-no. It usually is a smart idea for female mollies to outnumber males. If you keep a male and female duo together, you run the risk of him badgering her incessantly. Male mollies usually are truculent when placed together, so avoid that scenario.