The Maracyn and Maracyn Two came in 8 dose packets. I intend on using up all the meds and then giving Cabot another 5 - 7 days in quarantine before placing him back in the large tank. It also says on the Maracyn instructions that no water change is required providing the water levels (ammonia, ph, etc) are in the normal range.
Thanks Wilder for the link. Unfortunately; the info on the tropicalfishmeds.com site is likely 100% correct when using their antibiotic formulation only. The Mardel and API line of fish medications is what is widely available in Canada and their instructions are different than those for the tropicalfishmeds.com website. This is likely due to differences in formulation and half life etc.