Hey guys, i need help figuring this crap out! 
So like a week ago my Nitrite levels were at 10ppm in the danger zone. I quickly did a 50% water change. Every day since then i have been doing a 30-50% water change and using AmQuel+. I just did another one today at 50% and doubled the dosage of AmQuel and now the Nitrite is at .5-1 ppm in the caution/stress zone.
I tested for Ammonia and the levels are safe.
I currently have a Green Aro and Albino Oscar in there. It is a 75G tank with the Marineland Magnum 350 filter. The fish are eating and swimming fine.
Any recommendations or ideas?

So like a week ago my Nitrite levels were at 10ppm in the danger zone. I quickly did a 50% water change. Every day since then i have been doing a 30-50% water change and using AmQuel+. I just did another one today at 50% and doubled the dosage of AmQuel and now the Nitrite is at .5-1 ppm in the caution/stress zone.
I tested for Ammonia and the levels are safe.
I currently have a Green Aro and Albino Oscar in there. It is a 75G tank with the Marineland Magnum 350 filter. The fish are eating and swimming fine.
Any recommendations or ideas?