Thinking of setting up my first salt tank

[Ephraim]

I've heard that mushrooms will survive in lower light conditions. Are these a coral or techincally something else? How about anemones, are there any "friendly" ones that do well in low light? I've also heard that colt coral is good in low light. If I add another 48" 65x2 would that make a big difference? I've found that most halide fixtures are too wide for this thin tank.

I've got a bunch of extra powerheads i can add for more current. Is just one fluval and a skimmer really going to be enough for filtration?