not at all, i just hooked up my wet dry, with overflow with skimmer, i put 50 pounds of live rock that i got from a fellow saltwater hobbiest. that had his tank established for a year or more. i added water from the tap and salt mix. insta reef i think. i let that go for 2 weeks then i added bio spira et that sit for a week then i added my puffer hastily for fear that it would get sold lol. last night i did a 30 gal water change and added prime. tonight ill check the lvls again