Thank you! That is very helpful. I changed the water last night and added some nitrate remover to my canister filter to knock the level down as much as possible. I started with the salt first and we’ll see how that goes.
40 ppm nitrate level is hardly poor water quality considering the rest of the parameters are right where they should be, the PH is always stable, the rest of the fish are fine, my live plants are thriving, and the angels just laid eggs 8 days ago.
I’m not debating what the nitrate levels should or shouldn’t be, when out of the tap they are 10ppm. I just asked if anyone could help identify what the spot is on my fish. If you are suggesting the nitrates are the cause of that spot, then I’m all ears, but that seems unlikely to me.
Yeah, well I have nitrates in my tap water so I can only do so much and I haven’t changed my water yet this week. It stays below 50 and I don’t have a big algae problem. So, while I know it’s elevated, that doesn’t help answer my original question.
I don’t know if this constitutes an emergency, but I don’t know what this is. I was gone for a week and I came back to find my prize angelfish with this unknown spot on his upper body into his fin. Could anyone help identify what this is? None of the other fish in the tank are showing anything...