This pic is of the skunk clowns but you can see a black molly in the back. I always do my acclimation with a plastic two cup measuring cup. Added the fish and squirt from a turkey baster with tank saltwater. Started with one cup of water and fish. When the measuring cup was full, poured out half and started over. I do this 3 times with a squirt every 10-15 minutes. The original mollies are still going strong 3-4 months later. They've had babies about ever 4-6 weeks and the babies of course have never known freshwater. Very active, great eaters and look cool being all black with a mated pair of orange skunk clowns.