I have searched here and seen it a few times, but I have also googled it.
Fluval says that this tank is "reef ready" or salt ready atleast but it's not. There are a few minor things that really need to be done in order for it to be a successful saltwater environment.
1- change the filter. The edge comes stock with an aquaclear 10 I believe? You can replace that with an aquaclear 20 which has better flow and better filtration. This is a simple mod and it's pretty cheap... about 20-30 bucks.
2-the lighting. It is sucky lighting... It's not good for corals, coraline algae, and it's not even good for freshwater plants. That mod however is not so simple but it can be done. I have researched it... seems like it can be done really well for around 150 bucks, and it still looks nice. Other people just say to plop a different fixture on top but it simply ruins the effect of the whole "rimless" and no brace look. Why spend the money on the tank if you're gonna ruin it.
lemme see if I can find you some build links.