So today I got my order of Zoas from saltcritters.com and all the Zoas look perfect accept for the well know “brown stuff” that was floating on top of the baggies the drags came in. Which I read is relatively common. I decided on purchasing a mystery coral and unfortunately my mystery coral was an Acan which is sad because i was planning on having a softie tank. Having only this one SPS will I have to dose for calcium, alkalinity, etc or will weekly water changes be enough. Thank you guys and gals!