Seachem Pristine Fish & ; Aquatic Life Supplement For more than 30 years aquarium hobbyists have turned to Seachem Laboratories for products designed by chemists and biologists. Improve water quality in your freshwater or marine system with Seachem Pristine. Using non-chemical and natural bio-augmentation it provides bacteria that break down excess food waste and detritus and also reduces excess nutrients (e.g. ammonia nitrates and nitrites) that help the growth of nuisance and disease-causing organisms. Seachem Pristine increases water clarity and promotes overall better health.