Sparky my clown fish is staying on top of the water and listing on his side (although he quit that this afternoon ) as is able to stay upright now. He isnt eating and shows no sign of parasites on his external body. He was fine in the other tank but unfortunatly i had to take that tank down.
Here are my water parameters
Ammonia 0
Nitrites 0
Nitrates 5 ppm
PH 8.3
calcium 410
KH 11

Can substrate going aroebic cause sick fish

Thanks in advance

Rick