In order for SC-1000 to be used in the North Sea additional toxicity testing was needed, therefore GEMTEK Products commissioned Opus Plus Ltd., located in the United Kingdom to conduct aquatic tocixity testing for local species including Skeletonema costatum (algae) and Corophium volutator (mud shrimp).
Skeletonema costatum
| Test material | SC-1000 |
| Behaviour in seawater | Soluble |
| Preparation method | Dilution series |
| Range finding test period | November 30 – December 3, 2012 |
| Provisional 72h EC50 (mg.l) | 311.33 |
| Repeat Definitive test period | December 11 – 13, 2012 |
| 24h EC50 (mg.l) | 5.74 |
| 48h EC50 (mg.l) | 4.55 |
| 72h EC50 (mg.1) | 18.74 |
| 72h EC90 (mg.l) | 29.35 |
| NOEC (mg.l) | 3.2 |
Corophium volutator
| Test material | SC-1000 |
| Behaviour in seawater | Soluble |
| Preparation method | December 6 – 17, 2012 |
| 10d LC50 (mg.kg) | >16203 |
| 10d LC90 (mg.kg) | >16203 |
| 10d NOEC (mg.kg) | 1620 |