thinking of going marine with either my fluval edge or poss buy a slightly bigger more normal tank.....but my question is....do I NEED a protien skimmer?? Could I in theory just take the salt level up in the edge and keep running it how I run my brackish tropical? Guess what I really mean is will I need to buy any thing extra for it or can I run it as is but get the SG correct? thanks in advance.