| Alois Köttl | Austria | Sludge cones |
| Aquaculture Fischtechnik GmbH | Germany | Sludge cones |
| FREA A/S | Denmark | Sludge cones |
| Glasshouses trout farm limited | England | Sludge cones |
| Heidefisch GmbH | Germany | Sludge cones |
| Lihme Fiskeri | Denmark | Sludge cones |
| Newmill Fishing Ltd. | Scotland | Sludge cones |
| Nr. Ågård Dambrug | Denmark | Sludge cones |
| Seven Springs Trout Hatchery Ltd. | Northern Ireland | Sludge cones |
| Skade Dambrug | Denmark | Sludge cones |
| Tim Fiskeri | Denmark | Sludge cones |
| Water-Proved | Germany | Sludge cones |
| Østerhøjgård Fiskeri | Denmark | Sludge cones |
