I had two clownfish and live rock in this biocube. Been running with 0 nitrates for well over a year. Live sand. I use the bottled expensive aquarium water for changes. The one clownfish beat the other up, so then it housed the one and the other is in another tank.eventually the clown died suddenly after 14 months. All water parameters checked. I recently order a goby and it died immediately after acclimation, tried a yellow tang and it died after I did a 50% water change before putting it in after acclimation.. The fish seem to go through water acclimation fine until I release them in the tank. I’m running a more powerful pump than it came with, cleaned weekly, filter, fluval Carbon, and chempure.an it?