Saltwater tank problem.?

I just set up my gf 55gallon she has about 50lbs of live rock, 3in. bed of sand, 220watt power compact, and some corals. the problem is she is growing this brown alge stuff all over her rock, sand and edges of her glass. she has a few corals and i told her to feed micro-vert 50 drops a day only 2 days a week but she is dumb and feed it for 4 days straigt. and now the brown stuff doesnt stop growing so we scrubed the rocks and turned them over and kept the light off for a day and nothing happened. the next day we turn the light on at 3p.m. and by 10p.m. the brown stuff was growing again.
Answers:
sounds like you go some brown algae. What do you have in the tank for a cleaner crew? new tanks often go through a few algae blooms this may be one of them. That stuff can grow back very fast. Does it seem like any stringy hairs are coming up off it or just flat slimy coverage?

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New tanks (2-5 months) go through a couple of different algae blooms.
Don't turn your lights off, Just cut them back a couple of hours per day.
Make sure you have a GOOD cleaner crew.
For a 55 gal tank, I would have about 35 small blue leg hermits, About 40 ASSORTED snails, about 4-6 Scarlet Reef Hermits, a sand sifting seastar, 1 skunk cleaner shrimp, 1 blood red cleaner shrimp...
Use RODI water for topups and water changes.
Check your Phosphates and Nitrates.
Heavy skimming.
Check out this sight for cleaner crews.
http://www.liveaquaria.com/product/scate...
I wouldn't buy a cleaner pack but if you go to the inverts section you can pick what you NEED.
When you do water changes, try to syphen some of the algae out fithout disrurbing your sand bed .
I should have mentioned this before but DO NOT SCRUB YOUR ROCKS.
this will only get rid of a lot of your beneficial bacteria and micro organisms that help your tank.
Have fun.LOL and enjoy.