All native species 
This pack can include:
Gammarus shrimp ( gammarus pulex )
Water louse ( ascellus aquatics ) 
Daphnia ( daphnia pulex )
Freshwater copepods / Cyclops ( copepoda sp)
Black mosquito larvae ( culex sp )
White mosquito larvae ( choboborus )
Lesser water boatmen ( corixa sp )
Bloodworm ( Chironomus sp)
Tubifex worms ( tubifex tubifex )
Blackworm  ( Lumbriculus variegatus )
May also include some other micro species 
Dependent on available of each species some species may be absent but will be substituted and will always include a good mix.
This mix of species makes a great start to the base of a pond ecosystem both as cleaners aswell as a natural food source for the larger pond inhabitants