your plants should be fine. I use plant grow formula and my aquatic plants are bright green

very very rich color I could say.
You just need to have good lighting. I'd say florescent lighting would be best. Incandescent lighting isn't very good for the plants. Too strong
I keep a pleco in with my tanks, and sometimes I have plants in my discus/angelfish tank, and they just love trying to demolish them. So some how my plants are still alive. I barely ever put plant grow.
I never bought flourish before, but my tank is healthy.
So I am saying that if you have a healthy aquarium, then you'll be fine.