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Freshwater fish care guide

Molly

Poecilia spp.

Hard-water livebearer with many colors and body shapes.

Starter tank20+ gal
Temperature74–82°F
pH7.2–8.5
Group guide3+

Planning your aquarium

The library starting point is 20+ US gallons. Plan for the approximate 4.5-inch adult size and the species' normal activity, not just its current shop size.

The library suggests a group of at least 3. Count every individual when estimating stocking and swimming room.

Mixed-species aquariums may need substantially more space. Tank length, adult behavior, filtration, and hiding spaces all matter.

Tank setup and behavior

  • Check that the source water supplies suitable, stable mineral content.

A larger tank provides the swimming space and mineral stability suited to these active livebearers.

Hard-water livebearer with many colors and body shapes.

Food and feeding

Food options: Spirulina flakes, Quality pellets, Blanched vegetables.

Use appropriately sized, complete staple foods and rotate suitable foods for variety. Feed modest portions and remove uneaten food.

Additional care caution

Adults and fry increase the stocking load quickly; many mollies reach a larger size than guppies or platies.

Compatibility

The current rule-based checker does not list a dedicated pairing warning for this species. That does not mean every pairing is safe; review temperament, adult size, diet, habitat and water requirements.