Species in this pack include
Swan mussel ( Anodonta cygnea)
Pea mussel ( sphaerium corneum)
Duck mussel ( anodonta anatina)
Painters mussel ( union pictorum )
This pack comes in 3 options 
  Small  -  1 swan mussel 
                -  1 duck mussels
                -  1 painters mussel 
                 -  5 pea mussels 
                  
Medium - 2 swan mussels
                    - 2 duck mussels
                    - 2 painters mussels
                    - 10 pea mussels
    Large - 5 swan mussels
                  - 5 duck mussels
                  - 5 painters mussels
                  - 20 pea mussels 
                   
Each species filters Small organic particles and algae from the water column and can help control green or murky water.