I have a spare 10gal tank with light hood , aquatech 10-20 filter , 100w heater and the want to set up a small sw tank . Not looking for fancy just LR with a couple of inverts and a clownfish - an anemone if I could to have the clown feel at home . Also could I use LR/foam in the HOB filter instead of a carbon/biofoam refill . My main thing is can I actually make a tank like this happen . I don't want to lose my 125gal FW tank , so this will have to cure the SW itch .