fish love plants. they will color up because of the plants.
since you mention cabomba let me tell you whats working for me in my super lo tech setup: thats one plant thats flourishing in my tank. i have 1.5 WPG 6500K and lots of daylight (no direct sunlight). i infrequently dose liq ferts. my substrate is just 3-5mm gravel, 2 inch tall, so the plants are living off fish waste and the little ferts i give them. this has been going 2 months only so i am still tuning the system.
if this growth continues by christmas i will have a new cabomba farm in one area of my tank planted from the cuttings from existing plants.