brownish red algae all over tank

[Ghostlygoo]

For a little bit ive had this brownish red algae that has just covered my tank and some corals. Im very unhappy with the way my tank is right now and im unsure of what to do. I feel like ive tried everything so far for nothing to work. Below are pictures in normal light and white light. Ive cut down my light time aswell.

 

[Dread Pirate Dave]

How long has the tank been set up? What are your water parameters? Looks like some TLC is needed.

 

[Kweezy12]

looks like a combo of GHA and maybe some cyano.

manual scraping, water changes and maybe some algae killers

 

[Mr. Mojo Rising]

Do you have any powerheads in the tank? It looks stagnant, needs some water movement in there.
I don't see many snails or crabs? Need more clean up crew.
More water changes, scrub the rocks with a toothbrush.
Control the feeding.