Lee,
A picture is worth a thousand words. My quarantine tank is the left side of the fuge. I can easily feed it water from the main tank and drain it at the bottom. I put in a blue tang and pygmy angel. There was a sponge filter (that had been in the sump), but the air pump was weak. I also put in a piece of live rock and a piece of base rock. there was also some caulerpa in there. the next morning both fish were on the bottom gasping for air. Ammonia?
Any suggestions to improve the set up?