Converting my 20g freshwater to saltwater

[Demm]

Not sure if i'm allowed to post freshwater stuff, couldnt find anything against it in the rules and i definately want the fish to go to a good home so...I'm gonna be breaking down my 20g freshwater and turn it into a saltwater tank. I have a couple things that i need to get rid of:

Livestock (all free, but you must bring your own containers)

6 - Red eye tetra
6 - Black Skirt Tetra
7 or 8 - Neon Tetra
6 or 7 - glowlite Tetras
1 - Vampire Shrimp
2 - Highfin Cory Cats

Misc:

15lbs Florite Substrate (bring own container)- $10


Hagen Natural Plant CO2 system (the one that is yeast activated, comes with canister, ladder, and some tubing.) - $20obo


If you have any questions then Please PM me!

thanks for looking
-Andrew