pretty good explanation Sidzie, other that liquid carbons are actually a very dangerous chemical. It's used in hospitals for sterilising equipment. The chemical name is glutaraldehyde, it kills algae as it is toxic to it. It acts also as a building block a little like actual C02 (not as good though, even Seachem and Easylife will agree). It is good stuff though, i have used it with vallis with good effect, as long as it's not overdosed.
Just remember that you are going to have to increase you N and P when you start dosing this though as the demands on the plants will be higher.