Jim, increase CO2 a bit, it will help a lot. It is rather expensive doing Excel in a 85 gallon. Did not realize you also have a discus tank

I want to hear about your discus at next SFBAAPS plant swap. With high CO2 and regular dosing, I don't have any algae except a bit of hair algae on gravel.
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Truvu 100g Flourite, wet/dry, AHSupply 302w PC, PinPoint controller
10gallon15w T6+15w T8
55gallon40w T6 ODNO4x, no CO2. Discus grow out.
10gallon Tonina tank, 2x15w T6 ODNO 4x
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I will do aquascapes after I collect all the plant species and grow them to perfection.