Hello! I'm new to all of this so any advice is greatly appreciated. I have a 29 gallon bio cube with 19 pounds of live rock, 4 hermit crabs, and a small Kenyan tree. I've been dosing my tank for 4 days now using stability. I've added a clown fish on Sunday, he ate every night for feeding time and seemed happy. This morning I woke up and he was dead. I tested my water, PH 8.0, ammonia 0ppm, nitrite 0ppm nitrate 0ppm, and my temperature stays between 76-78 degrees. I'm not sure my salinity. Any ideas of what could have caused my clown to die? The Kenyan is very happy and doesn't seem bothered by anything..