Maintain consistently moist substrate, mimicking its aquatic or semi-aquatic habitat. Avoid waterlogged conditions in containers unless it is fully submerged.

For aquarium cultivation, ensure it is fully submerged and the water is clean and circulating gently. Reduce watering slightly during cooler periods.

Pruning is generally not required for *Ceratopteris richardii*. Remove any dead or yellowing fronds by gently pulling them from the base of the plant.

This helps maintain aesthetic appeal and prevents potential decay in the water, which could affect water quality.

Propagation is easily achieved through fragmentation or spores. Fronds can naturally break off and root, forming new plants.

Alternatively, allow spore capsules to mature on the underside of fronds; when released, they can germinate in suitable moist conditions, though this is a slower method.

Repotting is typically not necessary for *Ceratopteris richardii* when grown in aquariums as it is often free-floating or anchored in substrate.

If grown in a pot, repot only if it becomes root-bound, which is infrequent. Use a fine, sandy substrate if planting.