It's not your stress coat, or the choarcoal either.
Your biofilter is not stabilized yet. What you will have to do is start your tank over. Find a place to keep your fish and do a 100% water change and let it run for 1 week then slowly add fish in each day.
you can use the bio media that comes with the ac110 as your substrate for more biohouse.
You will have to find a way to house all your fish....ask a lfs.
Don't waste your money and time with the rest. I ran into the same problem twice a few months ago with my 135 and 20 gallon and I have been keeping fish for about 10 years now. Costed me $1000s in fish.
I had the same problem in my 135 gallon with less fish but my overstock 180 gallon was find
If you really pay attention and smell the fish tank water, you can tell that it had a strange odor and that its not a natural fish water smell.
Your biofilter is not stabilized yet. What you will have to do is start your tank over. Find a place to keep your fish and do a 100% water change and let it run for 1 week then slowly add fish in each day.
you can use the bio media that comes with the ac110 as your substrate for more biohouse.
You will have to find a way to house all your fish....ask a lfs.
Don't waste your money and time with the rest. I ran into the same problem twice a few months ago with my 135 and 20 gallon and I have been keeping fish for about 10 years now. Costed me $1000s in fish.
I had the same problem in my 135 gallon with less fish but my overstock 180 gallon was find

If you really pay attention and smell the fish tank water, you can tell that it had a strange odor and that its not a natural fish water smell.

