Freshwater Mussel

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Freshwater mussels are peaceful filter-feeding freshwater invertebrates that can make an interesting addition to established aquariums and ponds. They spend much of their time buried within the substrate, filtering microscopic food particles and organic matter from the water.

They are best suited to mature aquariums with stable water parameters and naturally available food. Unlike many aquarium invertebrates, mussels should not be expected to significantly clean or clarify a tank on their own.

Quick Care Guide

Aquarium Requirements

Provide a mature aquarium with stable water parameters, good oxygenation and a soft or sandy substrate that allows the mussel to burrow.

Feeding

Freshwater mussels are filter feeders and require microscopic food suspended in the water column. In very clean or heavily filtered aquariums, supplemental feeding with suitable phytoplankton or fine suspended foods may be required.

Water Parameters

Maintain stable freshwater conditions appropriate for the aquarium's inhabitants. Avoid sudden changes in temperature, pH or hardness.

Behaviour

Generally peaceful and non-aggressive. They commonly bury themselves in the substrate and may occasionally move around the aquarium.

FAQ

Do freshwater mussels clean aquariums?

They filter particles from the water, but they should not be purchased as a substitute for filtration or aquarium maintenance.

Do freshwater mussels need sand?

A soft substrate is strongly recommended because they naturally burrow and position themselves within the substrate.

What do freshwater mussels eat?

They filter microscopic particles, microorganisms and suspended organic matter from the water.

Can freshwater mussels live with fish?

Yes, generally with peaceful community fish. However, some fish may harass or attempt to eat them.

How long do freshwater mussels live?

Lifespan varies considerably between species, with some freshwater mussels capable of living for many years under suitable conditions.

Common Mistakes

Adding One to a New Aquarium

New tanks may not contain enough natural suspended food to support a filter-feeding mussel.

Expecting It to Filter the Entire Tank

Mussels are biological filter feeders, not a replacement for mechanical or biological filtration.

Keeping It in the Wrong Substrate

Very coarse gravel can prevent natural burrowing and make it difficult for the mussel to position itself.

Ignoring Water Quality

A mussel that becomes inactive, remains open or shows unusual behaviour should be monitored closely, as these can indicate stress or declining health.