PrimaLine Additives. Marine aquarium water additives by Elos. As part of our PrimaLine Integrators. They were developed with the view that beautiful marine aquaria do not need to be as time-consuming as some people may think. PrimaLine additives are designed to be simple to use, but also very precise to dose. On each bottle is clearly stated the concentration, individual elements or blending, that enables even the most advanced user to create their own integration program without the need for complicated calculation. As per our more specific ExpertLine, even these integrators are subject to our strict production processes, to supply to the aquarium-lover the most qualitative, safe, uncontaminated, pure quality, without the need of preservatives.