Carbon Source Question
dubvstudent is correct about the "Gluteraldehyde". This is an industrial form of carbon used for complex aquatic plant growth. The SeaChem product has 1.5 percent of the "Glut".
I've used a product called "Cidex" in the past that's much more concentrated, 3.4 percent "Glut". Haven't heard much about this brand in some time, but should still be available online.
The product with the "activator" is used to sterilize hospital surgical instruments and is very powerful. Without the "activator" you have what I call a "plant steroid". The guy I got if from said he had some pretty substanital plant growth when he used it. I used it briefly a few months ago, but stopped because it damaged my Java fern.
I'd use caution if you decide to use it. Gluteraldhyde in higher doses is toxic to more primitive aquarium plants like mosses, ferns and certain varieties of Vallisneria. I've heard of it used in high doses to kill algae.
"Fear not my child, just change the tank water."