I wokeup on the 2nd morning after putting my clownfish in my tank to find it huffing and puffing, gills and mouth going a mile a minute, I moved him to another tank, and half hour later he seemd better, now he seems great.
Later that day a shrimp died in the tank that the clown came out of. I tested the water for all the tests I had, Ammo, Nitrites, Nitrates etc but all came up good.
Went to the LFS and he said do a 25-50% water change because something thats toxic to fish must have been introduced to the water at some point.
I did that, and the last inhabitant (the green bristle star) is still alive and fine.
I thought about all the pollutants I might have been adding to the tank, and think I narrowed it down to being my fault. I have sprayed air freshener in the room (wont do that again), and I have used a product called Plexus, plastic cleaner, protectant and polish, on the front of the glass, and probably didnt wash my hands after doing that before putting them in the tank. So as someone else mentioned, there could be stuff in the water that we can't test for that would be toxic to the inhabitants of the tank.
My LFS recommended to me, that if anything dies in a tank, and you the water tests say everything is okay, then do a 25% to 50% water change to try and dilute whatever might be in the tank.
