Disposing of aquarium fish and plants or cleaning out the aquarium? Never tip aquarium plants or fish down the drain or anywhere near a stream. You may inadvertently introduce exotic species that could cause damage to the waterways. These fish and plants can compete with our native fish and the aquatic plants they depend on. Koi carp are a major pest fish – it is believed they were introduced by people releasing pets into the wild.
Acknowledgement: V.Angkatavanich, 123RF Ltd