I bought one clownfish that died within 24 hours and couldn’t figure out what the issue was, water parameters were perfect and showed no sign of any disease. 2 weeks later I bought 2 more smaller clowns and they died within hours with no signs of any disease again. Tested the water again and no issues. I can’t seem to figure out what’s going on as I’m new to the hobby. Could any one help me find the cause of this?