Yes, but you might reduce the KNO3 when feeding/having a good sized load of large cichlids like discus.

You might only need 1/2- 1/3 teaspoon 3x a week etc of KNO3.
I had a 90 for 10 years with Discus with about 1.5X more light.
So you should be safe with the routine and be able to feed well.

Regards,
Tom Barr