You can also take advantage of crayfish tanks as a natural habitat for invertebrates such as shrimp and crabs, as well as some fish species.
While most cray fish tanks have some level of algae, they are not required for aquaria.
The algae can grow on the surface of the tank, or on the sides of the water, so you may need to add some type of cover.
You may also need to check for algae growing on the substrate, such as under a rock or a rock face.
But if you do need to filter, you may want to do so at the fish’s own expense.
You can find a list of cayfish tank setups and accessories at the Consumer Reports website.
If you are unsure of what type of tank you need for your cay fish, it’s best to consult a professional.