🎾Enriching a Molly tank: hardscape, shoal and occupation
Molly : Sturdy plants that tolerate hard water, calcareous rocks and algae-covered grazing surfaces. It enjoys gentle surface agitation and areas with some current.
In short: 6 to 10 cm as an adult, 100 L minimum for a group, hard water between 24 and 28 °C. Active, sociable and a keen grazer, it enlivens the surface and decor all day in a female-dominant group. It needs warm, hard, alkaline water: in soft acidic water it quickly develops the shimmying disease.
Hardscape designed for its swimming zone
The swimming zone dictates the decor: a Molly moves in midwater, so tall plants at the back, wood as refuge and genuine swimming lanes organise its volume. An aquarium’s enrichment is its hiding places and its currents — not fluorescent ornaments.
Group life: the first enrichment
Read the Molly’s behaviour in its numbers: at 5+ you get displays, hierarchies and group swimming; below, a dull, stressed fish that hides — group size is the species’ first “toy”, before any decor purchase.
Food as occupation
Every Molly meal can become a hunt: release prey into the filter flow and move the feeding point from day to day — occupation comes from searching, not abundance.
Frequently asked questions
How many Molly should be kept together?
5 minimum, more if the tank allows: it is a group species, and numbers shape its behaviour and colours alike.
How do you enrich a Molly tank?
Through layout above all: decor designed for its living zone (in midwater), meals served in varied ways and a complete group — gadgets add nothing.
The guides that apply to you
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- Sand or fine gravel for the aquarium: which substrate to choose?
Sand or fine gravel for your aquarium? Sand suits bottom-sifting fish, gravel makes maintenance easier. Complete comparison with prices per litre.
- The Cleaner Wrasse and Its Cleaning Station: A Case Study in Cooperation
On the reef, some fish clean others of their parasites in exchange for food: an example of cooperation closely studied by scientists.
- Can Fish Count? What a Study on Numerical Discrimination Shows
A behavioral study reveals that some fish instinctively distinguish the larger group, a reflex tied to survival against predators.