< The Maracyn II is an Erythromycin derivative and handles gram negative bacteria. The Nitrofurazone handles both gram negative as well as gram positive bacteria. It also has some anitfungal properties too.> <<>> I went to this mom and pop aquarium shop and they didn’t have it but if you feel it’s critical, I have Petco and Petsmart I can check to see if they carry it. Anyway, thanks again for your help. I will let you know how the fish makes out. Take care, Joann ps: I’m gonna try attaching the photo again to this email. < Marina>> < The change in diet is a good idea for your Lake Malawi cichlid. Look at the ingredient list for medications you have available and I am sure you will see it listed. Get the one that has the most in it.