+1 on immature tank and unhappy nem.
Get your own test kits... $40 for an API Reef Master set (not the greatest but good enough for ballpark) is nothing compared to the value of our livestock and equipment. Being able to test your params the minute something looks off is invaluable, versus relying on store employees who have no vested interest in the outcome of the tests. Do you know your exact numbers for ammonia, nitrate, ca, alk, salinity, etc? "Fine" is a pretty unspecific assessment.