I am not running a skimmer atm.
I have one on order.
I'm guessing the cause of the high nitrates is the combination of the bioballs in the sump and the heavy bioload the tank has been on without proper filtration. A week ago I got rid of a huge 8" hippo tang that would poop up the tank like crazy. Since these fish were not my choice, they came with the tank, I would have not put a hippo in a 90g tank.
I really didn't want to carbon dose. But it seems I may have to, water changes are not going to be enough for this tank.
A refugium isn't out of the question either! I can always sell the bio pellet reactor or keep it, it was only 80 bucks so its not like I broke the bank buying it. I won't feel bad if I don't need it. I just am not ready to set up a refugium right now. I need to read more about setting one up with the setup I have underneath the tank.