liquid carbon?

any one heard of it/try using it?
--> http://www.fosterandsmithaquatics.com/product/prod_display.cfm?pcatid=22749&cmpid=03csegpl&ref=6112&subref=AA&CAWELAID=974139958

or something like
http://www.petcarerx.com/Catalog/ProductDetails.aspx?pid=21587&k=Seachem+Flourish+Excel&id=1776

?

tyco118 said:

any one heard of it/try using it?
--> http://www.fosterandsmithaquatics.com/product/prod_display.cfm?pcatid=22749&cmpid=03csegpl&ref=6112&subref=AA&CAWELAID=974139958

Click to expand...

If you are growing in an aquarium, underwater. Did you read what it was for before you started this thread?