I set it up in February 2019, but didn’t get fish in until March 2019. I had dry rock, and only two clownfish. I just bought the nem, tiger pistol shrimp, and yasha goby. I think due to the lack of nitrate/nutrients in the water the tank struggled to mature. I came from the freshwater hobby and I was under the impression that 0 nitrates/nutrients was a good thing. Turns out it is not….I’m hoping everything will turn out ok…I’m doing everything I can.Yea this tank is not a year and a half old. It's obvious. Take that nemmie back, it's going to die in there.