I have, its just a micro element fert.......one of the basic components for plant growth. How big is your tank, how much light, and how many live plants?
With lots of light and CO2, plants will also need fertilization. I think of them like three sides of a triangle that need to be in harmony - any two without the third will make things off-balance. To anthropomorphize, trace elements are essential to proper plant health, like vitamins and minerals for people, and things like nitrogen, phosphorous and potassium (NPK) are to plants what the four food groups are to us